Jxpath problem
I introduce jxpath to extract data from a java bean that was generated against a xml document with top link mapping.
Unfortunately i didn't get any result from my request even all seem correct and i didn't know how to debug to find the error or the problem.
Here is my code :
public Collection<ClassificationAlphaIndex> getClassificationAlphaIndex() {
if (classificationDocument != null) {
JXPathContext jxPathContext =
JXPathContext.newContext(classificationDocument);
Iterator resultList =
jxPathContext.iterate("//ClassificationEntryMainTitle");
colClassificationAlphaIndex.clear();
while (resultList.hasNext()) {
ClassificationAlphaIndex classificationAlphaIndex =
new ClassificationAlphaIndex();
classificationAlphaIndex.setClassificationAlphaIndexText((String)resultList.next());
colClassificationAlphaIndex.add(classificationAlphaIndex);
return colClassificationAlphaIndex;
Here is a part the xml document :
<classification-entry-list>
<classification-entry>
<classification-entry-identification>1</classification-entry-identification>
<classification-entry-code>1</classification-entry-code>
<classification-entry-code-fullPath>1</classification-entry-code-fullPath>
<classification-entry-category-code>Chapter</classification-entry-category-code>
<classification-entry-status>enable</classification-entry-status>
<classification-entry-title>
<classification-entry-main-title language="fr">A compléter</classification-entry-main-title>
</classification-entry-title>
<classification-entry>
<classification-entry-identification>2</classification-entry-identification>
<classification-entry-code>(A00-B99)</classification-entry-code>
<classification-entry-code-fullPath>1.(A00-B99)</classification-entry-code-fullPath>
<classification-entry-category-code>Grouping</classification-entry-category-code>
<classification-entry-status>enable</classification-entry-status>
<classification-entry-title>
<classification-entry-main-title language="fr">certaines maladies infectieuses et parasitaires</classification-entry-main-title>
<classification-entry-main-title language="en">Certain infectious and parasitic diseases</classification-entry-main-title>
<classification-entry-main-title language="de">Bestimmte infektiöse und parasitäre Krankheiten</classification-entry-main-title>
</classification-entry-title>
<classification-entry-external-reference>
<classification-entry-external-reference-system>CIM 10 Access database</classification-entry-external-reference-system>
<classification-entry-external-reference-key>(A00-B99)</classification-entry-external-reference-key>
<classification-data-entry-external-reference-import-date>2006-10-12</classification-data-entry-external-reference-import-date>
</classification-entry-external-reference>
</classification-entry>
Here is the corresponding interface :
public interface ClassificationEntryTitleType
public java.util.List getClassificationEntryMainTitle();
public java.util.List getClassificationEntryComplementaryTitle();
public java.util.List getClassificatinEntryIndexTitle();
Here is the implementation class :
public class ClassificationEntryTitleTypeImpl implements classification.toplinkInterface.ClassificationEntryTitleType
private java.util.List _ClassificationEntryMainTitle = new java.util.ArrayList();
private java.util.List _ClassificationEntryComplementaryTitle = new java.util.ArrayList();
private java.util.List _ClassificatinEntryIndexTitle = new java.util.ArrayList();
public java.util.List getClassificationEntryMainTitle()
return _ClassificationEntryMainTitle;
public void setClassificationEntryMainTitle(java.util.List value)
_ClassificationEntryMainTitle = value;
public java.util.List getClassificationEntryComplementaryTitle()
return _ClassificationEntryComplementaryTitle;
public void setClassificationEntryComplementaryTitle(java.util.List value)
_ClassificationEntryComplementaryTitle = value;
public java.util.List getClassificatinEntryIndexTitle()
return _ClassificatinEntryIndexTitle;
public void setClassificatinEntryIndexTitle(java.util.List value)
_ClassificatinEntryIndexTitle = value;
}
Probably a bug.
http://nagoya.apache.org/bugzilla/show_bug.cgi?id=20272
http://nagoya.apache.org/bugzilla/show_bug.cgi?id=15388
Similar Messages
-
Hi guys, I need help :-)
I managed to download the egate package of the sun enterprise system, however during the uploading of the egate package (egate.sar) I am getting a failed error.
eGate (1 of 1 Product List)
Bottom of Form
Product Name : eGate
Product Version : 5.1.0
Installed by User : Administrator
SAR File Name : C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285.sar
From Directory : C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285
File [0] = BaseESR.sar
File [1] = basicmapper.sar
File [2] = cme.sar
File [3] = codegenframework.sar
File [4] = codegenvalidation.sar
File [5] = commonmodel.sar
File [6] = commons.jxpath.sar
File [7] = configeditor.sar
File [8] = DatabaseModel.sar
File [9] = deploycli.sar
File [10] = deploymenteditor.sar
File [11] = edesigner.sar
File [12] = edhelp.sar
File [13] = eInsightIntegration.sar
File [14] = EncodingConverter.sar
File [15] = eventmanagement.sar
File [16] = eWaysCommon.sar
File [17] = guirepmanager.sar
File [18] = install.xml
File [19] = javadebugger.sar
File [20] = javaEditorModel.sar
File [21] = jce.sar
File [22] = jcealerter.sar
File [23] = jcecodegen.sar
File [24] = jmscodegen.sar
File [25] = jmsjca.sar
File [26] = login.sar
File [27] = META-INF
File [28] = mqjmsmessageserver.sar
File [29] = nb-cookies.sar
File [30] = nodefilechooser.sar
File [31] = otdcodegen.sar
File [32] = otdcsvwizard.sar
File [33] = otdfcxwizard.sar
File [34] = otdtester.sar
File [35] = otdud1flatwizard.sar
File [36] = otdud1wizard.sar
File [37] = projectexplorer.sar
File [38] = queue.sar
File [39] = repofiler.sar
File [40] = reportGenerator.sar
File [41] = RuntimeServer.sar
File [42] = schedulerotd.sar
File [43] = smeks.sar
File [44] = stcacl.sar
File [45] = stcconfigurationmodule.sar
File [46] = stccustomotdeditormodule.sar
File [47] = stccustomotdwizardcommonmodule.sar
File [48] = stcdeploymentframeworkmodule.sar
File [49] = stcdtdwizardmodule.sar
File [50] = stcenvironmentexplorer.sar
File [51] = stcimpactanalysis.sar
File [52] = stcimportexport.sar
File [53] = stcintegserver.sar
File [54] = stcjmsotdmodule.sar
File [55] = stclicense.sar
File [56] = stclog4JAdapter.sar
File [57] = stclogicalhost.sar
File [58] = stcmessageserver.sar
File [59] = stcnaming.sar
File [60] = stcotdeditormodule.sar
File [61] = stcotdlaunchermodule.sar
File [62] = stcotdmodule.sar
File [63] = stcrepositoryclient.sar
File [64] = stcversioncontrol.sar
File [65] = stcwizardcommonmodule.sar
File [66] = stcxsdwizardmodule.sar
File [67] = sunJavaSystem81.sar
File [68] = sunJavaSystem81EmbeddedMessageServer.sar
File [69] = topic.sar
File [70] = variableConstants.sar
File [71] = viewmanager.sar
File [72] = webservices.sar
File [73] = wsdlcodegen.sar
File [74] = wsdleditor.sar
File [75] = wsdlotd.sar
File [76] = xce.sar
File [77] = xcecodegen.sar
File [78] = xsdcodegen.sar
File [79] = xsdeditor.sar
Hot Deployment URL is: http://localhost:12000/manager
Install Directory File Name is: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\install.xml
Installation Started, Please wait ...
Refer to this upload session's Logs at:
C:\JavaCAPS51\repository\server\logs\eManagerInstaller-1170198173231.log
1 :
2 : install:
3 : [installsar] ***************************************************************
4 : [installsar] Installing SAR: commonmodel.sar
5 : [installsar] Executing script: C:\JavaCAPS51\repository\work\1170198181638/install.xml
6 : [unjar] Expanding: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\commonmodel.sar into C:\JavaCAPS51\repository\work\1170198181638
7 :
8 : all:
9 : [InstallRepAPI] API class name: com.stc.model.common.externalsystem.impl.ExternalSystemManagerImpl
10 : [InstallRepAPI] Connecting to Repository: http://localhost:12000/RepositoryName
11 : [InstallRepAPI] API SYSTEM ID: CommonExternalSystemManager/SBYN5454
12 : [InstallRepAPI] Updating JAR files for API: [C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelapi.jar, C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelimpl.jar]
13 : [InstallRepAPI] API installed successfully.
14 : [InstallRepAPI] API class name: com.stc.model.common.impl.ModuleManagerImpl
15 : [InstallRepAPI] Connecting to Repository: http://localhost:12000/RepositoryName
16 : [InstallRepAPI] API SYSTEM ID: ModuleManager/SBYN900
17 : [InstallRepAPI] Updating JAR files for API: [C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelapi.jar, C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelimpl.jar]
18 : [InstallRepAPI] API installed successfully.
19 : [InstallRepAPI] API class name: com.stc.model.common.impl.ProjectManagerImpl
20 : [InstallRepAPI] Connecting to Repository: http://localhost:12000/RepositoryName
21 : [InstallRepAPI] API SYSTEM ID: ProjectManager/SBYN700
22 : [InstallRepAPI] Updating JAR files for API: [C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelapi.jar, C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelimpl.jar]
23 : [InstallRepAPI] API installed successfully.
24 : [InstallRepAPI] API class name: com.stc.model.common.impl.EnvironmentManagerImpl
25 : [InstallRepAPI] Connecting to Repository: http://localhost:12000/RepositoryName
26 : [InstallRepAPI] API SYSTEM ID: EnvironmentManager/SBYN701
27 : [InstallRepAPI] Updating JAR files for API: [C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelapi.jar, C:\JavaCAPS51\repository\work\1170198181638\lib\com.stc.commonmodelimpl.jar]
28 : [InstallRepAPI] API installed successfully.
29 : [InstallModule] Module: commonmodel
30 : [InstallModule] Repository directory: InstallManager/edesigner/modules/
31 : [InstallModule] ED directory: modules/
32 : [InstallModule] Distributed URL: http://localhost:12000/repository/RepositoryName
33 : [InstallModule] Connecting to Repository: http://localhost:12000/RepositoryName
34 : [InstallModule] Updating Module: commonmodel
35 : [InstallModule] local temp catalog.xml path : C:\JavaCAPS51\repository\work\1170198181638\_tmpcatalog.xml
36 : [InstallModule] retrieving catalog.xml from repository
37 : [InstallModule] Adding Module: commonmodel
38 : [InstallModule] ED Module installed successfully.
39 : [InstallJava] Connecting to Repository: http://localhost:12000/RepositoryName
40 : [InstallJava] Filename : C:\JavaCAPS51\repository\work\1170198181638\commonmodel.nbm
41 : [InstallJava] Adding/Updating Java Module: commonmodel
42 : [InstallJava] Java Module installed successfully.
43 : [installsar] SAR file: commonmodel.sar installed successfully.
44 : [installsar] ***************************************************************
45 : [installsar] ***************************************************************
46 : [installsar] Installing SAR: commons.jxpath.sar
47 : [installsar] Executing script: C:\JavaCAPS51\repository\work\1170198187341/install.xml
48 : [unjar] Expanding: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\commons.jxpath.sar into C:\JavaCAPS51\repository\work\1170198187341
49 :
50 : all:
51 : [InstallModule] Module: commonsJXPath
52 : [InstallModule] Repository directory: InstallManager/edesigner/modules/
53 : [InstallModule] ED directory: modules/
54 : [InstallModule] Distributed URL: http://localhost:12000/repository/RepositoryName
55 : [InstallModule] Connecting to Repository: http://localhost:12000/RepositoryName
56 : [InstallModule] Adding Module: commonsJXPath
57 : [InstallModule] local temp catalog.xml path : C:\JavaCAPS51\repository\work\1170198187341\_tmpcatalog.xml
58 : [InstallModule] retrieving catalog.xml from repository
59 : [InstallModule] created Module from NBM file : C:\JavaCAPS51\repository\work\1170198187341\modules\commons.jxpath.nbm
60 : [InstallModule] module doesn't exist, adding to catalog.xml
61 : [InstallModule] wrote temp catalog.xml
62 : [InstallModule] uploaded temp catalog.xml to repository
63 : [InstallModule] ED Module installed successfully.
64 : [InstallJava] Connecting to Repository: http://localhost:12000/RepositoryName
65 : [InstallJava] Filename : C:\JavaCAPS51\repository\work\1170198187341\modules\commons.jxpath.nbm
66 : [InstallJava] Adding/Updating Java Module: commonsJXPath
67 : [InstallJava] Java Module installed successfully.
68 : [installsar] SAR file: commons.jxpath.sar installed successfully.
69 : [installsar] ***************************************************************
70 : [installsar] ***************************************************************
71 : [installsar] Installing SAR: stcrepositoryclient.sar
72 : [installsar] Executing script: C:\JavaCAPS51\repository\work\1170198188997/install.xml
73 : [unjar] Expanding: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\stcrepositoryclient.sar into C:\JavaCAPS51\repository\work\1170198188997
74 :
75 : install:
76 : [InstallModule] Module: RepositoryClient
77 : [InstallModule] Repository directory: InstallManager/edesigner/modules/
78 : [InstallModule] ED directory: modules/
79 : [InstallModule] Distributed URL: http://localhost:12000/repository/RepositoryName
80 : [InstallModule] Connecting to Repository: http://localhost:12000/RepositoryName
81 : [InstallModule] Adding Module: RepositoryClient
82 : [InstallModule] local temp catalog.xml path : C:\JavaCAPS51\repository\work\1170198188997\_tmpcatalog.xml
83 : [InstallModule] retrieving catalog.xml from repository
84 : [InstallModule] created Module from NBM file : C:\JavaCAPS51\repository\work\1170198188997\com.stc.repositoryclient.nbm
85 : [InstallModule] module doesn't exist, adding to catalog.xml
86 : [InstallModule] wrote temp catalog.xml
87 : [InstallModule] uploaded temp catalog.xml to repository
88 : [InstallModule] ED Module installed successfully.
89 : [InstallJava] Connecting to Repository: http://localhost:12000/RepositoryName
90 : [InstallJava] Filename : C:\JavaCAPS51\repository\work\1170198188997\com.stc.repositoryclient.nbm
91 : [InstallJava] Adding/Updating Java Module: RepositoryClient
92 : [InstallJava] Java Module installed successfully.
93 : [installsar] SAR file: stcrepositoryclient.sar installed successfully.
94 : [installsar] ***************************************************************
95 : [installsar] ***************************************************************
96 : [installsar] Installing SAR: viewmanager.sar
97 : [installsar] Executing script: C:\JavaCAPS51\repository\work\1170198191138/install.xml
98 : [unjar] Expanding: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\viewmanager.sar into C:\JavaCAPS51\repository\work\1170198191138
99 :
100 : all:
101 : [InstallModule] Module: viewmanager
102 : [InstallModule] Repository directory: InstallManager/edesigner/modules/
103 : [InstallModule] ED directory: modules/
104 : [InstallModule] Distributed URL: http://localhost:12000/repository/RepositoryName
105 : [InstallModule] Connecting to Repository: http://localhost:12000/RepositoryName
106 : [InstallModule] Adding Module: viewmanager
107 : [InstallModule] local temp catalog.xml path : C:\JavaCAPS51\repository\work\1170198191138\_tmpcatalog.xml
108 : [InstallModule] retrieving catalog.xml from repository
109 : [InstallModule] created Module from NBM file : C:\JavaCAPS51\repository\work\1170198191138\modules\viewmanager.nbm
110 : [InstallModule] module doesn't exist, adding to catalog.xml
111 : [InstallModule] wrote temp catalog.xml
112 : [InstallModule] uploaded temp catalog.xml to repository
113 : [InstallModule] ED Module installed successfully.
114 : [InstallJava] Connecting to Repository: http://localhost:12000/RepositoryName
115 : [InstallJava] Filename : C:\JavaCAPS51\repository\work\1170198191138\modules\viewmanager.nbm
116 : [InstallJava] Adding/Updating Java Module: viewmanager
117 : [InstallJava] Java Module installed successfully.
118 : [installsar] SAR file: viewmanager.sar installed successfully.
119 : [installsar] ***************************************************************
120 : [installsar] ***************************************************************
121 : [installsar] Installing SAR: cme.sar
122 : [installsar] Executing script: C:\JavaCAPS51\repository\work\1170198192528/install.xml
123 : [unjar] Expanding: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\cme.sar into C:\JavaCAPS51\repository\work\1170198192528
124 :
125 : all:
126 : [InstallRepAPI] API class name: com.stc.cme.migration.CMEManagerImpl
127 : [InstallRepAPI] Connecting to Repository: http://localhost:12000/RepositoryName
128 : [InstallRepAPI] API SYSTEM ID: CMEManager/SBYN110
129 : [InstallRepAPI] Adding JAR files for API: [C:\JavaCAPS51\repository\work\1170198192528\lib\com.stc.commonmodelapi.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\com.stc.commonmodelimpl.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\com.stc.cmemodelapi.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\com.stc.cme.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\JGo.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\JGoLayout.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\JGoSVG.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\log4j.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\concurrent.jar, C:\JavaCAPS51\repository\work\1170198192528\lib\com.stc.edutilapi.jar]
130 : [InstallRepAPI] API installed successfully.
131 : [InstallModule] Module: CME
132 : [InstallModule] Repository directory: InstallManager/edesigner/modules/
133 : [InstallModule] ED directory: modules/
134 : [InstallModule] Distributed URL: http://localhost:12000/repository/RepositoryName
135 : [InstallModule] Connecting to Repository: http://localhost:12000/RepositoryName
136 : [InstallModule] Adding Module: CME
137 : [InstallModule] local temp catalog.xml path : C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
138 : [InstallModule] retrieving catalog.xml from repository
139 : [InstallModule] Error while reading the Catalog.xml com.stc.repository.RepositoryException: Copy file failed. from : C:/JavaCAPS51/repository/data/files/InstallManager/catalog.xml to : C:/JavaCAPS51/repository/work/1170198192528/_tmpcatalog.xml : rename failed. : Cannot rename file: C:\JavaCAPS51\repository\work\1170198192528\forCopy50334.tmp to C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
140 : [InstallModule] Cannot rename file: C:\JavaCAPS51\repository\work\1170198192528\forCopy50334.tmp to C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
141 : [InstallModule]
142 : [InstallModule] No server error detail
143 :
144 : BUILD FAILED
145 : file:C:/JavaCAPS51/repository/work/1170198192528/install.xml:21: Copy file failed. from : C:/JavaCAPS51/repository/data/files/InstallManager/catalog.xml to : C:/JavaCAPS51/repository/work/1170198192528/_tmpcatalog.xml : rename failed. : Cannot rename file: C:\JavaCAPS51\repository\work\1170198192528\forCopy50334.tmp to C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
146 : Cannot rename file: C:\JavaCAPS51\repository\work\1170198192528\forCopy50334.tmp to C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
147 :
148 : Total time: 18 seconds
Reported execute exit value: 1
Buildfile: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285\install.xml
Executing installation script failed.
Failed to execute ant:
Executing installation script failed.
Adding product eGate to the Failed List.
Executing installation script failed.
::::::::::::::::: Installation Failed for :::::::::::::::::::::::::::::::
Name: eGate Version: 5.1.0
Deleting File: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285.sar
Deleting Folder: C:\JavaCAPS51\repository\upload\1913110EA9DFFA68B2EBF359BF4C9EFE\gsr2285From the following looks like renaming problem
139 : [InstallModule] Error while reading the Catalog.xml com.stc.repository.RepositoryException: Copy file failed. from : C:/JavaCAPS51/repository/data/files/InstallManager/catalog.xml to : C:/JavaCAPS51/repository/work/1170198192528/_tmpcatalog.xml : rename failed. : Cannot rename file: C:\JavaCAPS51\repository\work\1170198192528\forCopy50334.tmp to C:\JavaCAPS51\repository\work\1170198192528\_tmpcatalog.xml
Thinking loud - before creating the file is it trying to rename?? bcz of clock speed/processor speed..
bcz today i again i am able 2 install the product sucessfully. not able to reproduce the above bug/problem.
What is your m/c configuration?
thanks
ram -
ClassCastException - want using JXPATH
Hi there,
i've libraries i want to use which are using jxpath; the default oracle xml parser doesn't recognize the
InputStream is =
ServiceLocator.instance().getResourceLoader().getResourceAsStream(
configFile);
Reader reader = new InputStreamReader(is);
Document doc = DOMHelpers.instance().newDocument(reader);
Node root = doc.getFirstChild();
--> For unknown reasons i get NULL! for following:
final String jcdAlias =
DOMHelpers.instance().selectSingleValue(
root, "param[@name='jcdAlias']/@value");
--> DOMHelpers:
public Node selectSingleNode(Node aNode, String aXPathExpression) {
Object obj = this.selectSingleObject(aNode, aXPathExpression);
if ((obj != null) && !(obj instanceof Node)) {
LOGGER.warn(
MessageFormat.format(
"Keine Node Instanz {0}, {1}",
new Object[] {obj.getClass(), obj}));
return null;
return (Node)obj;
public String selectSingleValue(Node aNode, String aXPathExpression) {
Object val = this.selectSingleObject(aNode, aXPathExpression);
if (val == null) {
return null;
return extractText(val);
In TOMCAT 5.0x this works fine with JXPATH.
I've configurated the orion-web.xml with following values:
<classpath
path="../../../applications/isgsn/my_Server/WEB-INF/classes"
/>
<classpath
path="../../../applications/isgsn/my_Server/WEB-INF/lib"
/>
in /classes i've the commons-jxpath.jar...
or
<web-app-class-loader search-local-classes-first="true" />
both results in:
Caused by: java.lang.ClassCastException
at javax.xml.parsers.DocumentBuilderFactory.newInstance(Unknown Source)
at de.x.helpers.DOMHelpers.<init>(Unknown Source)
-->
* standard constructor (private; Singleton)
private DOMHelpers() {
documentBuilderFactory = DocumentBuilderFactory.newInstance();
documentBuilderFactory.setNamespaceAware(true);
documentBuilderFactory.setValidating(false);
does anyone has suggestions? i'm very tired searching for classpath settings :(
thanks.thanx mate for the reply,
i am sure that i am storing the same object in the vector.
first of all I tried the same code by writing small class same as yours & it worked fine so i implemented in my real implementation class. But it still gives me classCastException i am not able to understand it why???? Actually my Product class is a stateless session bean(hope u know EJB)
so actually i am storing a remote reference i.e(product)in my vector.But i dont think this should be a problem...
please help....
regards,
ashish -
We suspected af:tree had a bug but we observed during debugging that our problem is due to page life cycle and we are searching a way to solve it at the best :
Our problem is the following :
1) we have in the same page a af:tree linked to a java bean data control that present some content in a hierarchy form (link an index) and a second part that contains some ui that represent the selected af:tree node content (linked java bean content). The second part ui's are updateable
2) when we first load the page the af:tree is correctly rendered and we are able to navigate into into it without any problem (expand/collapse). The ui's are empty because we didn't select anything
3) when a node is selected in the af:tree the correspoding data are loaded in ui's. That is perfect.
4) when a second (another) node is selected we discovered that
4.a) the af:tree was positioned to the new node selected that mean that we changed the context in our java bean
4.b) the changes previously done in ui's were executed (eved nothing was edited) in the java bean and that in the wrong context.
This situation cause a mismatch in our java bean data
What is the best way to solve this ?
Is this described somewhere in the documentation how to solve such problem in a same page ?
Is ppr the way ?
Thanks in advanceHi Frank
What I was missing is that when a node is selected, a code from node details is setted as a parameter in the page, the page (outcome null in af:tree) is refreshed that will cause the ui's method binding to be executed again but after the parameter is setted. The ui's are built from the result a method that will get the corresponding java bean based on the parameter.
is this data queried by you or is it part of the tree node information or detail leafes?
They code is part of the tree node. It is setted into a page parameter. The ui's data is getted from a method (see below method iterator, methodaction from the page definition).
When you say data gets executed upon changing the tree row focus, what does this mean? Do you have a submit defined upon focus lost for the tree?
ui's binding is executed. The setter's are executed.
So what is the desired behavior you are looking for ?
The setter have to be executed before the java bean context is updated, i mean before the binding to the method action is executed
Actually i have, when i click on a node in a previously loaded page:
1) click on node
2) set the parameter from selected node
3) refresh the page
4) execute what we can name a java bean finder method (a java bean method that select a xml node in xml java bean using jxpath with a xpath expression that is executed from the method action in the page definition)
5) execute the setter from the binding (but into the wrong java bean because the method action change the java bean context)
In fact, 5) has to be executed before 4) is executed
That is my problem
af:tree code :
<af:tree value="#{bindings.ClassificationEntryListclassificationEntry.treeModel}"
var="node">
<f:facet name="nodeStamp">
<h:panelGroup>
<af:commandLink text="#{node}">
<f:param name="selectedEntry"
value="#{node.classificationEntryCode}"/>
</af:commandLink>
</h:panelGroup>
</f:facet>
</af:tree>Page definition :
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel"
version="10.1.3.39.84" id="untitled1PageDef"
Package="view.pageDefs">
<parameters/>
<executables>
<iterator id="ClassificationDocumentDataControl_rootIter" RangeSize="10"
Binds="root" DataControl="ClassificationDocumentDataControl"/>
<accessorIterator id="classificationIterator" RangeSize="10"
Binds="classification"
DataControl="ClassificationDocumentDataControl"
BeanClass="classification.testcase.castor.Classification"
MasterBinding="ClassificationDocumentDataControl_rootIter"/>
<accessorIterator id="classificationEntryListIterator" RangeSize="10"
Binds="classificationEntryList"
DataControl="ClassificationDocumentDataControl"
BeanClass="classification.testcase.castor.ClassificationEntryList"
MasterBinding="classificationIterator"/>
<accessorIterator id="classificationEntryIterator" RangeSize="10"
Binds="classificationEntry"
DataControl="ClassificationDocumentDataControl"
BeanClass="classification.testcase.castor.ClassificationEntry"
MasterBinding="classificationEntryListIterator"
Refresh="ifNeeded"/>
<variableIterator id="variables"/>
<methodIterator id="findClassificationEntryByIdentificationIter"
Binds="findClassificationEntryByIdentification.result"
DataControl="ClassificationDocumentDataControl"
RangeSize="10"
BeanClass="classification.testcase.castor.ClassificationEntry"/>
</executables>
<bindings>
<tree id="ClassificationEntryListclassificationEntry"
IterBinding="classificationEntryIterator">
<AttrNames>
<Item Value="classificationEntryCode"/>
<Item Value="classificationEntryCount"/>
<Item Value="valid"/>
</AttrNames>
<nodeDefinition DefName="classification.testcase.castor.ClassificationEntry"
id="ClassificationEntryNode">
<AttrNames>
<Item Value="classificationEntryCode"/>
</AttrNames>
<Accessors>
<Item Value="classificationEntry"/>
</Accessors>
</nodeDefinition>
</tree>
<methodAction id="findClassificationEntryByIdentification"
InstanceName="ClassificationDocumentDataControl.dataProvider"
DataControl="ClassificationDocumentDataControl"
MethodName="findClassificationEntryByIdentification"
RequiresUpdateModel="true" Action="999"
IsViewObjectMethod="false"
ReturnName="ClassificationDocumentDataControl.methodResults.ClassificationDocumentDataControl_dataProvider_findClassificationEntryByIdentification_result">
<NamedData NDName="entryIdentification"
NDValue="#{param.selectedEntry}"
NDType="java.lang.String"/>
</methodAction>
<attributeValues id="classificationEntryCode"
IterBinding="findClassificationEntryByIdentificationIter">
<AttrNames>
<Item Value="classificationEntryCode"/>
</AttrNames>
</attributeValues>
</bindings>
</pageDefinition>Hope it is a little bit more clear -
Problems with Cocoon 2.03 and Weblogic 6.1 SP3
I am having problems with Cocoon 2.03 and Weblogic 6.1 SP3, when I try to deploy
the cocoon.war.
Cocoon works fine when I unpack the cocoon.war into ...\mydomain\applications
(after I changed cocoon.xconf to use the following transformer factory: org.apache.xalan.processor.TransformerFactoryImpl).
However, when I deploy the cocoon.war through the weblogic console and try to
invoke cocoon (http://localhost:7001/cocoon/) I get the following error:
ERROR (2002-09-26) 11:28.40:859 [sitemap] (/cocoon/) ExecuteThread: '7' for
queue: 'default'/Handler: Error compiling sitemap
java.util.zip.ZipException: The system cannot find the file specified
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:110)
at java.util.zip.ZipFile.<init>(ZipFile.java:125)
at weblogic.utils.zip.ZipURLConnection.getInputStream(Handler.java:49)
at org.apache.cocoon.components.source.URLSource.getInputStream(URLSource.java:151)
at org.apache.cocoon.components.source.URLSource.getInputSource(URLSource.java:223)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.generateResource(ProgramGeneratorImpl.java:318)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.createResource(ProgramGeneratorImpl.java:282)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.load(ProgramGeneratorImpl.java:196)
at org.apache.cocoon.sitemap.Handler.run(Handler.java:228)
at java.lang.Thread.run(Thread.java:484)
I understood that there were problems when the cocoon.war file that did occur
when you unpacked the war, but I believed that these problems did not occur with
WLS6.1 SP3.
Has anyone else encountered this problem and solved it? Any help would be greatly
appreciated.
Thanks in advance.
PaulThis how I got Cocoon 2.04 up and running on WLS 6.1.4
Download the Cocoon source from http://xml.apache.org/cocoon/dist/
Remove all but the following JARs from lib/optional:
commons-jxpath-1.0.jar
jing-20020724.jar
resolver-20020130.jar
servlet_2_2.jar
commons-logging-1.0.jar
jtidy-04aug2000r7-dev.jar
rhino-1.5r3.jar
xt-19991105.jar
Update lib/jars.xml to reflect these changes
Issue build commands:
./build.sh clean (Note: Always clean first!)
./build.sh -Dinclude.webapp.libs=yes -Dexclude.webapp.samples=yes -Dexclude.webapp.documenation=yes
-Dexclude.webapp.javadocs=yes webapp
Copy the following JARs to your WLS instance’s lib directory:
xercesImpl-2.0.0.jar
xml-apis.jar
xalan-2.3.1.jar
xt-19991105.jar
java/lib/tools.jar
Sample of config/SERVER_NAME.setenv
LIB=/path/to/lib
JARS=$LIB/xercesImpl-2.0.0.jar:$LIB/xml-apis.jar:$LIB/xalan-2.3.1.jar:$LIB/xt-19991105.jar:/opt/java1.3/lib/tools.jar
JAVACLASSPATH=$JARS:.:$JAVACLASSPATH
JAVA_HOME=/opt/java1.3
Deploy the resluting cocoon.war and you should have a Cocoon up and running that
can do the XML->HTML Hello World sample. The status page works fine too.
My advice is to launch this stripped configuration first and if needed add more
features later by adding the JARs of your choice to the class path (or add the
to your webapp-build if you are confident that WLS are capable of handling their
manifests).
Good luck
/Peter
"Paul Petley" <[email protected]> wrote:
>
>
I am having problems with Cocoon 2.03 and Weblogic 6.1 SP3, when I try
to deploy
the cocoon.war.
Cocoon works fine when I unpack the cocoon.war into ...\mydomain\applications
(after I changed cocoon.xconf to use the following transformer factory:
org.apache.xalan.processor.TransformerFactoryImpl).
However, when I deploy the cocoon.war through the weblogic console and
try to
invoke cocoon (http://localhost:7001/cocoon/) I get the following error:
ERROR (2002-09-26) 11:28.40:859 [sitemap] (/cocoon/) ExecuteThread:
'7' for
queue: 'default'/Handler: Error compiling sitemap
java.util.zip.ZipException: The system cannot find the file specified
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:110)
at java.util.zip.ZipFile.<init>(ZipFile.java:125)
at weblogic.utils.zip.ZipURLConnection.getInputStream(Handler.java:49)
at org.apache.cocoon.components.source.URLSource.getInputStream(URLSource.java:151)
at org.apache.cocoon.components.source.URLSource.getInputSource(URLSource.java:223)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.generateResource(ProgramGeneratorImpl.java:318)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.createResource(ProgramGeneratorImpl.java:282)
at org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.load(ProgramGeneratorImpl.java:196)
at org.apache.cocoon.sitemap.Handler.run(Handler.java:228)
at java.lang.Thread.run(Thread.java:484)
I understood that there were problems when the cocoon.war file that did
occur
when you unpacked the war, but I believed that these problems did not
occur with
WLS6.1 SP3.
Has anyone else encountered this problem and solved it? Any help would
be greatly
appreciated.
Thanks in advance.
Paul -
I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
LeftyThis was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
boolean active = true;
public void run(){
ss.setSoTimeout(90);
while (active){
try{
serverSocket = ss.accept();
catch (SocketTimeoutException ste){
// do nothing
// interrupt thread
public void deactivate(){
active = false;
// you gotta sleep for a time longer than the
// accept() timeout to make sure that timeout is finished.
try{
sleep(91);
}catch (InterruptedException ie){
interrupt();
} -
A problem with Threads and MMapi
I am tring to execute a class based on Game canvas.
The problem begin when I try to Play both a MIDI tone and to run an infinit Thread loop.
The MIDI tone "Stammers".
How to over come the problem?
Thanks in advance
Kobi
See Code example below:
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
public class MainScreenCanvas extends GameCanvas implements Runnable {
private MainMIDlet parent;
private boolean mTrucking = false;
Image imgBackgound = null;
int imgBackgoundX = 0, imgBackgoundY = 0;
Player player;
public MainScreenCanvas(MainMIDlet parent)
super(true);
this.parent = parent;
try
imgBackgound = Image.createImage("/images/area03_bkg0.png");
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
imgBackgoundY = this.getHeight() - imgBackgound.getHeight();
catch(Exception e)
System.out.println(e.getMessage());
* starts thread
public void start()
mTrucking = true;
Thread t = new Thread(this);
t.start();
* stops thread
public void stop()
mTrucking = false;
public void play()
try
InputStream is = getClass().getResourceAsStream("/sounds/scale.mid");
player = Manager.createPlayer(is, "audio/midi");
player.setLoopCount(-1);
player.prefetch();
player.start();
catch(Exception e)
System.out.println(e.getMessage());
public void run()
Graphics g = getGraphics();
play();
while (true)
tick();
input();
render(g);
* responsible for object movements
private void tick()
* response to key input
private void input()
int keyStates = getKeyStates();
if ((keyStates & LEFT_PRESSED) != 0)
imgBackgoundX++;
if (imgBackgoundX > 0)
imgBackgoundX = 0;
if ((keyStates & RIGHT_PRESSED) != 0)
imgBackgoundX--;
if (imgBackgoundX < this.getWidth() - imgBackgound.getWidth())
imgBackgoundX = this.getWidth() - imgBackgound.getWidth();
* Responsible for the drawing
* @param g
private void render(Graphics g)
g.drawImage(imgBackgound, imgBackgoundX, imgBackgoundY, Graphics.TOP | Graphics.LEFT);
this.flushGraphics();
}You can also try to provide a greater Priority to your player thread so that it gains the CPU time when ever it needs it and don't harm the playback.
However a loop in a Thread and that to an infinite loop is one kind of very bad programming, 'cuz the loop eats up most of your CPU time which in turn adds up more delays of the execution of other tasks (just as in your case it is the playback). By witting codes bit efficiently and planning out the architectural execution flow of the app before start writing the code helps solve these kind of issues.
You can go through [this simple tutorial|http://oreilly.com/catalog/expjava/excerpt/index.html] about Basics of Java and Threads to know more about threads.
Regds,
SD
N.B. And yes there are more articles and tutorials available but much of them targets the Java SE / EE, but if you want to read them here is [another great one straight from SUN|http://java.sun.com/docs/books/tutorial/essential/concurrency/index.html] .
Edited by: find_suvro@SDN on 7 Nov, 2008 12:00 PM -
Hi all,
I would like to ask you for a help. I need to write a small program at my university. I started to write a midlet which function would be to countdown time for sports activities. I woul like to start a new thread - the one that counts down - and at the same time make the main thread sleep. After the "countdown" thread finishes, the main thread wakes up and waits for user input. The problem is that when the "countdown" thread finishes his work, I've got Uncaught exception java/lang/NullPointerException. error and the midlet halts.
Below you can find the code
import java.lang.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class intervals extends MIDlet implements CommandListener
public Display ekran;
private SweepCanvas sweeper;
private Form rundy;
private TextField round0, round1, round2, round3, round4, round5, round6, round7, round8;
private long czas,x;
private Command exitCommand;
private Command addRound;
private Command delRound;
private Command start;
private TextField repeat;
private Form odliczanie;
private Alert ostrz;
Licznik thread;
String test;
StringItem test1;
int parz,i,j,k;
static int l;
int ilrund;
int ilpowt;
Item sec;
long sec1;
public intervals()
rundy = new Form("Interwały sportowe");
exitCommand = new Command("Wyjście", Command.EXIT, 2);
addRound = new Command("Dodaj","Dodaj rundę", Command.ITEM,1);
delRound = new Command("Usuń","Usuń ostatnią rundę", Command.ITEM,1);
start = new Command("Start", Command.ITEM,1);
odliczanie = new Form("Odliczanie");
TextField dodaj(TextField kolej)
kolej=new TextField("Podaj czas (s) rundy "+parz,null, 4, TextField.NUMERIC);//stworzenie nowej instancji do wybierania czasu trwania rundy
if(rundy.size()==0)
rundy.insert(rundy.size(),kolej);
else
rundy.insert(rundy.size()-1, kolej);
return kolej;
void odliczanie(TextField round)
monitor m=new monitor();
k=Integer.parseInt(round.getString());
ekran.setCurrent(odliczanie);
thread=new Licznik(k,odliczanie);
thread.start();
ekran.setCurrent(rundy);
public void startApp()// throws MIDletStateChangeException
rundy.deleteAll();
repeat = new TextField("Podaj ilość powtórzeń",null,1,TextField.NUMERIC);
rundy.addCommand(addRound);
rundy.addCommand(exitCommand);
rundy.setCommandListener(this);
Canvas obrazek = new MyCanvas();
ekran = Display.getDisplay(this);
ekran.setCurrent(obrazek);
czas=System.currentTimeMillis();
while (System.currentTimeMillis()<czas+1000)
continue;
ekran.setCurrent(rundy);
public void pauseApp()
public void destroyApp(boolean unconditional)
notifyDestroyed();
public void commandAction(Command c, Displayable s)
if (c == exitCommand)
destroyApp(false);
notifyDestroyed();
else if(c==addRound)
if(rundy.size()==0)//Sprawdzenie ilości elementów w celu poprawnego wyświetlania liczby rund w formie
parz=1;
else
parz=rundy.size();
switch(parz)
case 1:
round0=dodaj(round0);break;
case 2:
round1=dodaj(round1);break;
case 3:
round2= dodaj(round2);break;
case 4:
round3=dodaj(round3);break;
case 5:
round4=dodaj(round4);break;
default:
ostrz=new Alert("Uwaga","Maksymalna liczba rund wynosi 9", null, AlertType.INFO);
ostrz.setTimeout(3000);
ekran.setCurrent(ostrz);
if(rundy.size()==1)
rundy.append(repeat);
rundy.addCommand(start);
rundy.addCommand(delRound);
else if(c==delRound)
if(rundy.size()!=0)
rundy.delete(rundy.size()-2);
if (rundy.size()==1)
rundy.deleteAll();
if(rundy.size()==0)
rundy.removeCommand(delRound);
rundy.removeCommand(start);
else if(c==start)
ilrund=rundy.size()-1;
if(this.repeat.size()>0)
ilpowt=Integer.parseInt(this.repeat.getString());
ekran = Display.getDisplay(this);
for (i=1; i<=ilpowt;i++)
odliczanie= new Form("Odliczanie");
for (j=0;j<ilrund;j++)
switch(j)
case 0:
odliczanie(round0);
break;
case 1:
odliczanie(round1);
break;
case 2:
odliczanie(round2);
break;
case 3:
odliczanie(round3);
break;
case 4:
odliczanie(round4);
break;
case 5:
odliczanie(round5);
break;
case 6:
odliczanie(round6);
break;
case 7:
odliczanie(round7);
break;
case 8:
odliczanie(round8);
break;
class Licznik extends Thread
int czas1,k;
Form forma;
monitor m;
public Licznik(int k,Form formap)
czas1=k;
forma=formap;
public synchronized void run()
while(czas1>0)
forma.deleteAll();
forma.append("Czas pozostały (s): "+czas1);
try{Thread.sleep(1000);} catch(InterruptedException e){e.printStackTrace();}
czas1--;
if(czas1<=0)
m.put();
}and monitor class
public class monitor
boolean busy=false;
synchronized void get()
if(!busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
notify();
synchronized void put()
if(busy)
try
wait();
}catch(InterruptedException e){e.printStackTrace();}
busy=true;
notify();
}Can anybody help me with this?Groovemaker,
Your Licznik class has a member m of type monitor, which has not been instantiated (in other words is null) hence, when calling m.put() you get NullPointerException. Please also mind, that using Thread.sleep(1000) is not an accurate way of measuring time.
If I may, please use recommended for Java class naming conventions - some of your names use lower case, while other don't which is confusing to the reader.
Daniel -
Problem with threads within applet
Hello,
I got an applet, inside this applet I have a singleton, inside this singleton I have a thread.
this thread is running in endless loop.
he is doing something and go to sleep on and on.
the problem is,
when I refresh my IE6 browser I see more than 1 thread.
for debug matter, I did the following things:
inside the thread, sysout every time he goes to sleep.
sysout in the singleton constructor.
sysout in the singleton destructor.
the output goes like this:
when refresh the page, the singleton constructor loading but not every refresh, sometimes I see the constructor output and sometimes I dont.
The thread inside the singleton is giving me the same output, sometime I see more than one thread at a time and sometimes I dont.
The destructor never works (no output there).
I don't understand what is going on.
someone can please shed some light?
thanks.
btw. I am working with JRE 1.1
this is very old and big applet and I can't convert it to something new.Ooops. sorry!
I did.
public void start() {
public void stop() {
public void destroy() {
try {
resetAll();
Configuration.closeConnection();
QuoteItem.closeConnection();
} finally {
try {
super.finalize();
} catch (Throwable e) {
e.printStackTrace();
} -
Problem with Threads and a static variable
I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
protected static void Init(){
objMainProcess = new Thread() {
public void run() {
while( objMainProcess == Thread.currentThread() ) {
GetState();
objMainProcess.setDaemon( true );
objMainProcess.start();
public static void initStatusTimer(){
if(objTimer == null)
objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
public void actionPerformed( java.awt.event.ActionEvent evt){
SetState();
private static void SetState(){
if( objMainProcess == null ) return;
synchronized( objMainProcess ) {
bChanged = true;
try{
objMainProcess.notify();
}catch( IllegalMonitorStateException e ) {}
private static boolean GetState() {
if( objMainProcess == null ) return false;
synchronized( objMainProcess ) {
if( bChanged) {
SendMessage();
bChanged = false;
return true;
try {
objMainProcess.wait();
}catch( InterruptedException e ) {}
return false;
}Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D. -
Problem with threads running javaw
Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue; // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer) // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
// System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
}catch(Exception a){
JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run -
Problem with Threads and "plase wait..."-Window
Hi everyone,
I have a problem that I'm not able to solve in any way... I have a time-consuming task (a file decryption) which I execute in a separate thread; I've used the SwingWorker class, like suggested by sun-tutorial, and it works right. The problem is that I have to wait that the decryption have finished before continuing with program-execution. Therefore I would like to display a "please wait"-window while the task runs. I've tryed all the possible ways I know but the problem is always the same: the waitWindow is displayed empty, the bounds are painted but the contents no; it's only painted when the decrypt-task has finished. Please help me, I have no more resources....
decrypt-file code:
public class DecryptFile {
private String cryptedFileNameAndPath;
private ByteArrayInputStream resultStream = null;
// need for progress
private int lengthOfTask;
private int current = -1;
private String statMessage;
public DecryptFile(String encZipFileNameAndPath) {
cryptedFileNameAndPath = encZipFileNameAndPath;
//Compute length of task...
// 0 for indeterminate
lengthOfTask = 0;
public ByteArrayInputStream getDecryptedInputStream() {
return this.resultStream;
* Called from ProgressBarDemo to start the task.
public void go() {
current = -1;
final SwingWorker worker = new SwingWorker() {
public Object construct() {
return new ActualTask();
worker.start();
* Called from ProgressBarDemo to find out how much work needs
* to be done.
public int getLengthOfTask() {
return lengthOfTask;
* Called from ProgressBarDemo to find out how much has been done.
public int getCurrent() {
return current;
public void stop() {
current = lengthOfTask;
* Called from ProgressBarDemo to find out if the task has completed.
public boolean done() {
if (current >= lengthOfTask)
return true;
else
return false;
public String getMessage() {
return statMessage;
* The actual long running task. This runs in a SwingWorker thread.
class ActualTask {
ActualTask () {
current = -1;
statMessage = "";
resultStream = AIUtil.getInputStreamFromEncZip(cryptedFileNameAndPath); //here the decryption happens
current = 0;
statMessage = "";
}The code that calls decryption and displays waitWindow
final WaitSplash wS = new WaitSplash("Please wait...");
final DecryptFile cryptedTemplate = new DecryptFile (this.templateFile);
cryptedTemplate.go();
while (! cryptedTemplate.done()) {
try {
wait();
} catch (Exception e) { }
this.templateInputStream = cryptedTemplate.getDecryptedInputStream();
wS.close();Thanks, thanks, thanks in advance!
EdoardoMaybe you can try setting the priority of the long-running thread to be lower? so that the UI will be more responsive...
-
im using jdk 1.6 with java wtk 2.1
ya i know..
2.1 is a jdk1.4 source
but im using souce as 1.4 during compiliation so thats not the prob
this is my code
package org.learn;
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Display;
public class thtest extends MIDlet
Thread t;
public void startApp()
Alert a=new Alert("hello");
a.setString("hello");
Alert b=new Alert("world");
b.setString("world");
Display d = Display.getDisplay(this );
d.setCurrent(a);
t=Thread.currentThread();
try{
t.sleep(10000);
catch (Exception e){}
d.setCurrent(b);
public void pauseApp()
public void destroyApp(boolean unconditional)
its just supposed to pause between the alerts using threads
however when i run it using the wtk, the emulator run properly but when i launch the app, it stops executing giving me this:
"Error verifying method org/learn/thtest startApp()V
Approximate bytecode offset 49: Inconsistent or missing stackmap at target
%the stack info%
Execution completed.
437782 bytecodes executed
9 thread switches
486 classes in the system (including system classes)
2506 dynamic objects allocated (73832 bytes)
2 garbage collections (60652 bytes collected)
Execution completed.
437782 bytecodes executed
9 thread switches
486 classes in the system (including system classes)
ALERT: java/lang/VerifyError: org/learn/thtest.
2506 dynamic objects allocated (73832 bytes)
2 garbage collections (60652 bytes collected)
please can someone help me out with this, is it an error on my part or do i have to set some option.Hi gandalf123,
First, Thread.sleep is a static method, so you don't need to create a Thread object to use it.
I think the problem is due to the fact you don't preverify your midlet.
More over, you don't need to double post your question. -
Problem with threads and camera.
Hi everybody!
I've a problem with taking snapshot.
I would like to display a loading screen after it take snapshot ( sometimes i
have to wait few seconds after i took snapshot. Propably photo is being taken in time where i have to wait).
I was trying to use threads but i didn't succeed.
I made this code:
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while((!performing.isShown()) && (backgroundCamera.isShown())){
Thread.yield();
notifyAll();
}).start();
new Thread(new Runnable(){
public void run() {
try {
this.wait();
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start();This code is sometimes showing performing screen but sometimes no.
I don't know why. In my opinion performing.isShown() method isn't working correctly.
Does anyone have some idea how to use threads here?Hi,
I've finally managed to work this fine.
The code:
Object o = new Object();
display.setCurrent(perform);
new Thread(new Runnable(){
public void run() {
while(!performing.isShown()){
Thread.yield();
synchronized(o) {
o.notify();
}).start();
new Thread(new Runnable(){
public void run() {
try {
synchronized(o) {
o.wait(1);
} catch(Exception e) {
exceptionHandler(e);
photo = camera.snapshot();
display.setCurrent(displayPhoto);
}).start(); -
Problem with threads and graphics
I have a thread that chooses paths for a Travelling salesman problem, it then calls a TSPdraw class and passes it the path, which the class then draws. the problem is when i have two threads it creates two windows but only draws a path in one of them. any ideas where i`m going wrong
Are you using swing components? Swing isn't threadsafe. If you have multiple threads that want to update your UI you need to use the SwingUtilities.invokeLater(...)or invokeAndWait(...). There is a page in the swing tutorial about this at: http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html
Maybe you are looking for
-
Whenever I upgrade database from sharepoint foundation 2010 to 2013 using powershell ( stsadm.exe -o addcontentdb -url http://.....) I get this error when i try to navigate in Sharepoint Central administration Help (new window) Go back to site Error
-
Depolyed PRovider is not running in Oc4j home,
Hi, I depolyed the JPDK provider and portlet to oracle application Server 10g's Oc4j home. The depolyment is sucessfull, but the provider is not running, The PDK test page failed to display the provider sucess message. So I am not able to register th
-
Time Machine wiped out all my backups!
This morning, Time Machine wiped out all my existing Time Machine backups and started a new, full backup of my startup drive.. My Time Machine volume was only half full, and I use TimeMachineEditor to schedule backups once a day instead of every hour
-
Adding a wallpaper image?
To Dps Users, anyone know if its possible to save a wallpaper image into the photo album of the ipad via the dps tools. Regards Vividi
-
I have the same problem I've seen others have. Since the last upgrade on Reader all of my PDF files have a generic icon. Any ideas of how to fix this?