Concurrent modification of Indirect Set
Hello, the last months I have been working with JPA without going deeply in it, currently my project is suffering some issues with concurrency.
I have a OneToMany relationship defined as a Set (default values that is transparent indirection), the core of the project is a EJB 3; when two concurrent invocations of the EJB 3 try to modify (adding and removing) an element of the Set toplink send a ConcurrentModificationException, I thought that toplink manages the concurrency but I must haver missed something...
Caused by: Exception [TOPLINK-6055] (Oracle TopLink Essentials - 2.0 (Build b58g-fcs (09/07/2007))): oracle.toplink.essentials.exceptions.QueryException
Exception Description: The method invocation of the method [public java.lang.Object java.util.HashSet.clone()] on the object [[class org.cesga.ifec.engine.database.ACRequestRegister[id=1642], class org.cesga.ifec.engine.database.ACRequestRegister[id=1643], of class [class java.util.HashSet], triggered an exception.
Internal Exception: java.lang.reflect.InvocationTargetException
Target Invocation Exception: java.util.ConcurrentModificationException
at oracle.toplink.essentials.exceptions.QueryException.methodInvocationFailed(QueryException.java:746)
at oracle.toplink.essentials.internal.queryframework.InterfaceContainerPolicy.invokeCloneMethodOn(InterfaceContainerPolicy.java:221)
at oracle.toplink.essentials.internal.queryframework.InterfaceContainerPolicy.cloneFor(InterfaceContainerPolicy.java:105)
at oracle.toplink.essentials.mappings.CollectionMapping.buildCloneForPartObject(CollectionMapping.java:173)
at oracle.toplink.essentials.internal.indirection.UnitOfWorkQueryValueHolder.buildCloneFor(UnitOfWorkQueryValueHolder.java:75)
at oracle.toplink.essentials.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:176)
at oracle.toplink.essentials.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:247)
at oracle.toplink.essentials.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:105)
at oracle.toplink.essentials.indirection.IndirectSet.buildDelegate(IndirectSet.java:193)
at oracle.toplink.essentials.indirection.IndirectSet.getDelegate(IndirectSet.java:308)
at oracle.toplink.essentials.indirection.IndirectSet.add(IndirectSet.java:168)
at org.cesga.ifec.engine.Engine.newACRequest(Engine.java:1608)
at sun.reflect.GeneratedMethodAccessor224.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1067)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:176)
at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2895)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:3986)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197)
... 62 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor213.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at oracle.toplink.essentials.internal.security.PrivilegedAccessHelper.invokeMethod(PrivilegedAccessHelper.java:322)
at oracle.toplink.essentials.internal.queryframework.InterfaceContainerPolicy.invokeCloneMethodOn(InterfaceContainerPolicy.java:216)
... 80 more
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
at java.util.HashMap$EntryIterator.next(HashMap.java:834)
at java.util.HashMap$EntryIterator.next(HashMap.java:832)
at java.util.HashMap.putAllForCreate(HashMap.java:435)
at java.util.HashMap.clone(HashMap.java:669)
at java.util.HashSet.clone(HashSet.java:236)
... 85 more
Thanks!!
Luis M.
The latest code in EclipseLink seems to be correctly synchronizing. You could try using EclipseLink 1.0 and see if the issue still occurs.
Workarounds may include:
- using a List or Collection instead of Set
- use eager
- use an isolated (not shared) cache
James : http://www.eclipselink.org
Similar Messages
-
Revision: 1043
Author: [email protected]
Date: 2008-03-31 15:22:13 -0700 (Mon, 31 Mar 2008)
Log Message:
Bug: LCDS-184 - Concurrent modification exception thrown during remote subscription management
QA: Yes
Doc: No
Details:
Make the 'subscriptions' set in MessageClient/RemoteMessageClient concurrent modification safe.
Ticket Links:
http://bugs.adobe.com/jira/browse/LCDS-184
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/services/messaging/RemoteMess ageClient.java -
Revision: 1044
Author: [email protected]
Date: 2008-03-31 15:23:07 -0700 (Mon, 31 Mar 2008)
Log Message:
Bug: LCDS-184 - Concurrent modification exception thrown during remote subscription management
QA: Yes
Doc: No
Details:
Make the 'subscriptions' set in MessageClient/RemoteMessageClient concurrent modification safe.
Ticket Links:
http://bugs.adobe.com/jira/browse/LCDS-184
Modified Paths:
blazeds/branches/3.0.x/modules/core/src/java/flex/messaging/MessageClient.java -
Hello,
Just a question about a piece of code.
I have an EJB3 application with a simple Job object containing Configuration objects in an ArrayList.
The job is managed by a stateful session bean used to add and remove configurations. Cascading for the configurations inside the job is set to CascadeType.ALL.
Adding configurations works fine, but removing them is a standard way results in ConcurrentModificationExceptions.
I solved this exception by using thread synchronization inside the removeConfiguration method.
The workaround code is
public void removeConfiguration(String configName)
throws InvalidParameterException, EntityDoesNotExistException,
OperationNotAllowedException, StorageException {
if(job == null){
throw new OperationNotAllowedException("No job was created or selected.");
//Since removing elements from the list on configurations resulted
//in a concurrent modification exception at runtime, we had to create
//a deep clone of the array of configurations. After creating the deep
//clone, the element to remove will be removed from the deep copy.
//Both operations require non modification guarantee to the original
//configuration list.
//After updating the deep copy, the new list of configurations will
//be stored in the job. During this operation no modification guarantee
//is required for the deep copy.
List<Configuration> configurations = new ArrayList<Configuration>();
//Prevent modifications to the original list of configurations.
synchronized(job.getConfigurations()){
//Create the deep clone while locking the original configurations.
for(Configuration config : job.getConfigurations()){
configurations.add((Configuration)config.clone());
//Remove the object to be removed from the deep copy while locking
//the original configurations.
for(Configuration config : job.getConfigurations()){
if(config.getDescription().equals(configName)){
configurations.remove(config);
//Lock the deep copy and write it to the created/selected job.
//Prevent modifications to the deep copy.
synchronized(configurations){
job.setConfigurations(configurations);
}The code above works as expected and does not cause any exceptions.
The simplified code causing exceptions to be thrown:
public void removeConfiguration(String configName)
throws InvalidParameterException, EntityDoesNotExistException,
OperationNotAllowedException, StorageException {
if(job == null){
throw new OperationNotAllowedException("No job was created or selected.");
for(Configuration config : job.getConfigurations()){
if(config.getDescription().equals(configName)){
job.getConfigurations().remove(config);
}Allthough the first snippet works fine, it seems a bit strange to me. Isn't it recommended not to use synchronization inside business method and leave this up to the container?
Or is the solution just fine and not a problem at all. Code should be neat and not prone to errors or unexpected behaviour. This is my concern for the code above.
Better solutions are always welcome and will be Duke rewarded off course!
Thanks for your opinion. Regards,
KurtHi,
I replaced the synchronized code with the one below and everything works as expected.
Thanks to both of you for the fast response and for your help.
The new snippet looks a lot more solid to me.
public void removeConfiguration(String configName)
throws InvalidParameterException, OperationNotAllowedException {
ParameterValidation.stringNotNullNotEmpty(configName, "removeConfiguration", "config name", LOG);
if(job == null){
throw new OperationNotAllowedException("No job was created or selected.");
ListIterator<Configuration> lstConfiguration = job.getConfigurations().listIterator();
while(lstConfiguration.hasNext()){
Configuration config = lstConfiguration.next();
if(config.getDescription().equals(configName)){
lstConfiguration.remove();
}Regards,
Kurt -
Concurrent modification exception inside fully synchronized code
Hello,
We have a private list
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We do however get Concurrent Modification excpetions on this list when we do performance tests with heavy load on the sun server + heavy load on the java server itself. I cannot understand this problem in any other way that this must be a problem with the virtual machine! I know you guys probably will object to this furiously, but I am 100% sure that there is no logical error in my code.
We're running on jre 1.5..0_03. uname -a on my solaris host gives me:
SunOS trinity 5.8 Generic_108528-27 sun4u sparc SUNW,Sun-Fire-480R.
Best regards,
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for (ConnectionChannel connectionChanel : channels) {
connectionChanel.send(event);
synchronized (channels) {
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synchronized (channels) {
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} -
Fndload command to download concurrent program without value set definition
Hi All,
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Edited by: 873477 on Mar 8, 2012 1:55 AMI agree with Sandeep -- The only option is editing the ldt file after the download and before you upload it.
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I have to make a light modification on EQ setting an all clips
I assembled about 40 min. of a film, and I put en EQ audio (from Logic tab) an all clips (same setting for all clips). Now, playing back the film, I realized that I have to make a light modification on EQ setting (an all clips). Which is the quickest way to do it?
Thanks in advanceThe other way, and what I now do all the time, is to add the audio clips to a "Role" (eg "Interview Speech") and then export the audio as a separate file (using the Export features).
Then add the EQ/effect in Logic or even import the clip straight back in and *then* put the effects on it in FCPX and disable all the original clips (using the Role features again, this is easy).
If timing changes, you need to re-export/import but I find this less troublesome than using compound clips just for audio.
The problem with using compound clips just for adding audio effects is that it can degrade the editing experience or the quality of your project (not the output quality, the usability of your project). I can no longer line up other clips against the audio clips or connect them individually (because they're hidden in their own compound clip).
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Word has it, that this problem will be solved by FCPX adding a "mixer". Maybe you'd still use "Roles" but the mixer will allow you to add effects to "Roles". Something like that, anyway. -
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I have a data structure like below
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I have a timerTask which at every interval iterates the inner hashMap and Modifies an attribute in the Object (Say Decrements an Integer attribute in the Object)
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While the iteration is in progress inside the TimerTask, if i try to Modify the HashMap from outside via some other method call, I receive a concurrent Modification Exception.
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Hi,
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FailedObject:dk.pine.mediamanager.ejb.model.Application-58
at
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Impl.java:577)
at
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at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1394)
at org.jboss.tm.TxCapsule.commit(TxCapsule.java:364)
(full stack trace included as attachment)
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jboss 3.0.4
sql server 2000
windows 2000
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M+FEN=F]K92A%<G)O<E)E<&]R=%9A;'9E+FIA=F$Z,3<R*0T*(" @(&%T(&]R
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M=F%L=F5S+D%C8V5S<TQO9U9A;'9E+FEN=F]K92A!8V-E<W-,;V=686QV92YJ
M879A.C0V.2D-"B @("!A="!O<F<N87!A8VAE+F-A=&%L:6YA+F-O<F4N4W1A
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M=F]K94YE>'0H4W1A;F1A<F10:7!E;&EN92YJ879A.C8T,2D-"B @("!A="!O
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M8VAE+F-A=&%L:6YA+F-O<F4N0V]N=&%I;F5R0F%S92YI;G9O:V4H0V]N=&%I
M;F5R0F%S92YJ879A.CDY-2D-"B @("!A="!O<F<N87!A8VAE+F-A=&%L:6YA
M+F-O<F4N4W1A;F1A<F1%;F=I;F5686QV92YI;G9O:V4H4W1A;F1A<F1%;F=I
M;F5686QV92YJ879A.C$W-"D-"B @("!A="!O<F<N87!A8VAE+F-A=&%L:6YA
M+F-O<F4N4WKodo handled the concurrency by telling you your instance was stale.
I.e:
A bank account starts with $0.
A person retrieves the account with $0 balance.
Person 2 retrieves the account with $0 balance.
Person 1 deposits the account with $5 ($0 + $5 = $5 total).
Person 2 deposits the account with $2 ($0 + $2 = $2 total)
Person 1 commits. The Account the DB is now at $5.
Person 2 attempts to commit. The version of Account is stale, and thus
tells the application that Person 2 is attempting to put in invalid data
(it should instead be at $7).
With pessismistic locking, Person 2 has to wait for Person 1 to finish.
Thus the deadlock:
Person 1 locks up resource a.
Person 2 locks up resource b.
Person 2 attempts to lock up resource a but is waiting for Person 1 to
finish.
Person 1 attempts to lock up resource b but is waiting for Person 2 to
finish.
These are the kinds of situations that Kodo does handle, but it is up to
you to figure out what to do when such concurrency situations happen...
i.e. handle the optimistic lock exception.
Jesper Ladegaard wrote:
Hi,
When multiple ejb instances/threads are accessing the same persistence
object I get this exception:
javax.jdo.JDOUserException: An instance was concurrently modified in another
transaction (optimistic lock #: 238).
FailedObject:dk.pine.mediamanager.ejb.model.Application-58
at
com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush(PersistenceManager
Impl.java:577)
at
com.solarmetric.kodo.ee.EEPersistenceManager.beforeCompletion(EEPersistenceM
anager.java:192)
at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1394)
at org.jboss.tm.TxCapsule.commit(TxCapsule.java:364)
(full stack trace included as attachment)
The only field accessed is a collection - objects are added to the
collection from several bean instances.
Is kodo not supposed to handle this?
The optimistic property is set to default (true). I've tried setting it to
false, but then the app server hangs or dead locks occur in the database.
System configuration:
jdk 1.4
kodo 2.4.2
jboss 3.0.4
sql server 2000
windows 2000
Thanks
Jesper
2003-03-31 15:06:28,520 TRACE [org.jboss.tm.TxCapsule] failed before completion
javax.jdo.JDOUserException: Errors were detected when flushing to the data store. If using optimistic transactions, this could indicate that lock violations were detected. The "getNestedExceptions" method of this Exception will return the specific errors.
NestedThrowables:
javax.jdo.JDOUserException: An instance was concurrently modified in another transaction (optimistic lock #: 238).
FailedObject:dk.pine.mediamanager.ejb.model.Application-58
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush(PersistenceManagerImpl.java:577)
at com.solarmetric.kodo.ee.EEPersistenceManager.beforeCompletion(EEPersistenceManager.java:192)
at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1394)
at org.jboss.tm.TxCapsule.commit(TxCapsule.java:364)
at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:73)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:201)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy52.createTemplate(Unknown Source)
at dk.pine.mediacreator.web.TemplateUploadAction.execute(TemplateUploadAction.java:90)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:437)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:264)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.WebFilter.doFilter(WebFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:527)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
at java.lang.Thread.run(Thread.java:536)
NestedThrowablesStackTrace:
javax.jdo.JDOUserException: An instance was concurrently modified in another transaction (optimistic lock #: 238).
FailedObject:dk.pine.mediamanager.ejb.model.Application-58
at com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping$1.afterUpdate(ClassMapping.java:611)
at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeInternal(SQLExecutionManagerImpl.java:455)
at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.flush(SQLExecutionManagerImpl.java:272)
at com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:411)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush(PersistenceManagerImpl.java:575)
at com.solarmetric.kodo.ee.EEPersistenceManager.beforeCompletion(EEPersistenceManager.java:192)
at org.jboss.tm.TxCapsule.doBeforeCompletion(TxCapsule.java:1394)
at org.jboss.tm.TxCapsule.commit(TxCapsule.java:364)
at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:73)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:201)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy52.createTemplate(Unknown Source)
at dk.pine.mediacreator.web.TemplateUploadAction.execute(TemplateUploadAction.java:90)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:437)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:264)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.WebFilter.doFilter(WebFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:527)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
at java.lang.Thread.run(Thread.java:536)
2003-03-31 15:06:28,530 TRACE [org.jboss.tm.TxCapsule] Before completion done, tx=XidImpl [FormatId=257, GlobalId=jla//19908, BranchQual=], status=STATUS_MARKED_ROLLBACK
2003-03-31 15:06:28,530 WARN [org.apache.struts.action.RequestProcessor]
2003-03-31 15:06:28,530 ERROR [org.jboss.web.localhost.Engine] StandardWrapperValve[action]: Servlet.service() for servlet action threw exception
javax.servlet.ServletException
at org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:498)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:439)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:264)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.WebFilter.doFilter(WebFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:527)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
at java.lang.Thread.run(Thread.java:536)
2003-03-31 15:06:28,550 ERROR [org.jboss.web.localhost.Engine] ----- Root Cause -----
java.lang.reflect.UndeclaredThrowableException
at $Proxy52.createTemplate(Unknown Source)
at dk.pine.mediacreator.web.TemplateUploadAction.execute(TemplateUploadAction.java:90)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:437)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:264)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1109)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:470)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.WebFilter.doFilter(WebFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at dk.pine.core.util.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:213)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:527)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
at java.lang.Thread.run(Thread.java:536)
Caused by: javax.transaction.RollbackException: Unable to commit, tx=XidImpl [FormatId=257, GlobalId=jla//19908, BranchQual=] status=STATUS_ROLLEDBACK
at org.jboss.tm.TxCapsule.commit(TxCapsule.java:425)
at org.jboss.tm.TransactionImpl.commit(TransactionImpl.java:73)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:201)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)
at org.jboss.ejb.Container.invoke(Container.java:712)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:111)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
... 46 more--
Stephen Kim
[email protected]
SolarMetric, Inc.
http://www.solarmetric.com -
Package Variable Concurrent Modification
Say I have the following public global variable defined in a package specification:
create or replace package my_pkg is
my_var number := 0;
end my_pkg;
Is it possible for procedures from other packages (or within the same package) to concurrently access/modify the value of my_var, or is there some sort of locking mechanism to protect against this? If not, is there any sort of semaphore implementation that would allow me to manually protect a shared resource?crottyan wrote:
So it's not possible to have multiple concurrent processes executing within a single session?Yes, but not the way you think.
A session is a serialised process. A session is serviced by a serialised Oracle server process. Threading is not supported in this processing model - and for very good and sound reasons.
However, a serialised session can be serviced by multiple parallel processing processes - courtesy of the Parallel Query (PQ) feature of Oracle. PQ can be used for servicing DDL and DML calls made by that session, in parallel - and this also includes the ability to run PL/SQL code in parallel via a feature called pipeline table functions.
However, this is more comparable to the Unix fork() model than the Windows CreateThread() model. Each PQ process is an actual process image in the kernel. It does not share the code or data segments of the process servicing that session.
There is a fundamental concept issue with your question though. It does not make ANY sense within Oracle architecture to have a package's data segment (and a static variable in it), being accessed concurrently. This is not how Oracle's concurrency model works. This should not even be a consideration during the design.
I suggest that you familiarise yourself properly with the Oracle architecture as the question shows serious gaps in understanding this architecture. -
Concurrent Modification in a loop
This loop iterates through a list of urls that parses a document for urls, if it finds some, then it adds them to a PriorityQueue. I'm getting the modification exception when the loop runs the second time at the it.next() line. Can someone help me with why?
public synchronized void TidyProcess()
Iterator it = urlQueue.iterator();
String userURL;
while (it.hasNext())
javax.swing.JEditorPane jEditorPane1 = TC1.getEditorPane();
userURL = it.next().toString();
int position = jEditorPane1.getText().length();
try
jEditorPane1.getDocument().insertString(position, "Processing: " + userURL, null);
catch(javax.swing.text.BadLocationException e)
logger.debug(e.getMessage());
Document tidydoc = TP1.tagParser(userURL); //retrieves document in XML format
String xmldoc = tidydoc.toXML();
urlQueue.addAll(TP1.getUrls(tidydoc)); //Processes the document for urls, returns them in a PriorityQueue collection
}Message was edited by:
subnetrx
Message was edited by:
subnetrxYou need to add via the Iterator (cast it to a ListIterator) not to the collection itself, otherwise the iterator will complain.
-
Modification or Default Setting for Organization Viewer
Is there a way to set the Organization Viewer in Spaces to show the whole organization as a default?
Currently when a user logs in it shows were the user sits in the orginization, but you have to exspand everything to see the orginization as a whole. We would like for the Organization View display to a Public user and display the Org chart for the First 3 Top levels of the orginization.
Is there a way we can do this, or is there a way to modify it in Jdeveloper or a Presenter template?If you set up a blank document the way you'd like with fonts, styles, margins, tabs, etc. & save it as a template, it will show up in the Template Chooser. You can then set this template as the default for all new Pages documents in Preferences.
-
Implementing an event list, concurrent modification
Hello,
I've made a list into which I append events, and process them according to their ordering.
The problem is that an event processing can cause another event to be appended to this same list. So I get ConcurrentModificationExceptions by the iterator of the list.
Can somehow avoid the need to copy the event list before iterating over it??
Any help is very welcomed
DimitrisCan you just set a flag that blocks other events while the list is processing? i.e. on first insert... block events until insert and processing is done, then set it true so future events can be added?
Rob -
Concurrent modification exception while iterating through list
Hi,
I have a list of objects. I use for each loop in java to iterate through that list of objects and display them.
The problem is that while iterating other thread can add or remove some objects from that list, and I get ConcurrentModificationException.
How can I handle this problem. How can I be sure that I am iteration through the updated list.
Thank youSynchonize on the list before iterating through it, and make sure that other code also synchronizes on the list before adding to it or removing from it. Using a list implementation that simply synchronizes all the methods (e.g. Vector) will not do that, you have to do it yourself.
-
Concurrent modification exception. What is causing this?
Here is my the pasrt of code causing the exception I have put a line comment ti indicate the line where it occurs. In addition I would like to know the cause of this eception as its a first for me.
Here is the full exception ....
Exception in thread "AWT-EventQueue-0" java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:3
72)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at Contact.modifyExisting(Contact.java:432)
at Phonebook1.actionPerformed(Phonebook1.java:236)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:19
95)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicRootPaneUI$Actions.actionPerformed(BasicR
ootPaneUI.java:191)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2849)
at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:267)
at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:2
16)
at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.
java:2926)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2918)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2812)
at java.awt.Component.processEvent(Component.java:5815)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.ja
va:1848)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboard
FocusManager.java:697)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeybo
ardFocusManager.java:962)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeybo
ardFocusManager.java:834)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFoc
usManager.java:661)
at java.awt.Component.dispatchEventImpl(Component.java:4282)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)and the code.......
if(modifiedWork.length()>0)
try
modifiedWorkNum = Integer.parseInt(modifiedWork);
} //////// THIS IS LINE 372
catch(Exception e)
JOptionPane.showMessageDialog(null,"You may only enter numbers for a valid phone number to try again press the modify nutton again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
}Thanks in advance...Would you mind looking at my modifyExisting method I apologise as it is long. I have icluded a line comment on line 432.
public void modifyExisting()
{// Start of modifyExisting()
int count = 0;
int count1 = 0;
int count2 = 0;
int modifiedCellNum, modifiedWorkNum, modifiedHomeNum = 0;
boolean validModify = true;
boolean found = false;
String currentHome = "";
String currentWork = "";
String currentCell = "";
if(phoneList.size() > 0)
String nameOfContactToEdit = JOptionPane.showInputDialog(null,"Please enter the name of the contact you wish to edit details for or press cancel to exit");
if(nameOfContactToEdit == null)
finish();
if(nameOfContactToEdit.trim().length()<= 0)
JOptionPane.showMessageDialog(null,"You have entered an invalid name. Please try again.","Error",JOptionPane.ERROR_MESSAGE);
modifyExisting();
validModify = false;
return;
String surnameOfContactToEdit = JOptionPane.showInputDialog(null,"Please enter the the surname for "+nameOfContactToEdit+" if one exists or press cancel to exit.");
if(surnameOfContactToEdit == null)
finish();
for(Person m: phoneList)
m = phoneList.get(count);
if((m.name).equals(nameOfContactToEdit.trim().toUpperCase())&&(m.surname).equals(surnameOfContactToEdit.trim().toUpperCase()))
currentHome = m.home;
currentWork = m.work;
currentCell = m.cell;
found = true;
count ++;
if(found == true)
String modifiedName = JOptionPane.showInputDialog("Please enter the new name for contact or press cancel to keep it as "+nameOfContactToEdit+".");
if(modifiedName == null)
modifiedName = nameOfContactToEdit;
if(modifiedName.trim().length()<= 0)
JOptionPane.showMessageDialog(null,"You have entered an invalid name. Please press the modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
return;
if(modifiedName.trim().length()>10)
JOptionPane.showMessageDialog(null,"You may not enter a new name longer than 10 characters long. Please try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
modifyExisting();
return;
String modifiedSurname = JOptionPane.showInputDialog("Please enter the new surname for contact or press cancel to keep it as "+surnameOfContactToEdit+".");
if(modifiedSurname == null)
modifiedSurname = surnameOfContactToEdit;
if(modifiedSurname.trim().length()>10)
JOptionPane.showMessageDialog(null,"You may not enter a surname longer than 10 characters long. Please try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
modifyExisting();
return;
String modifiedHome = JOptionPane.showInputDialog("Please enter a new home number for "+modifiedName+" or press cancel to keep it as is.");
if(modifiedHome == null)
modifiedHome = currentHome;
if(modifiedHome.length()>0)
try
modifiedHomeNum = Integer.parseInt(modifiedHome);
catch(Exception e)
JOptionPane.showMessageDialog(null,"You may only enter numbers for a valid phone number to try again press the modify nutton again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
if(modifiedHome.length() > 10)
JOptionPane.showMessageDialog(null,"You may not enter a number longer than 10 characters long. Please press the modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
String modifiedWork = JOptionPane.showInputDialog("Please enter a new home number for "+modifiedName+" or press cancel to keep it as is.");
if(modifiedHome == null)
modifiedWork = currentWork;
if(modifiedWork.length()>0)
try
modifiedWorkNum = Integer.parseInt(modifiedWork);
catch(Exception e)
JOptionPane.showMessageDialog(null,"You may only enter numbers for a valid phone number to try again press the modify nutton again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
if(modifiedWork.length() > 10)
JOptionPane.showMessageDialog(null,"You may not enter a number longer than 10 characters long. Please press the modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
String modifiedCell = JOptionPane.showInputDialog("Please enter a new home number for "+modifiedName+" or press cancel to keep it as is.");
if(modifiedCell == null)
modifiedCell = currentCell;
if(modifiedCell.length()>0)
try
modifiedCellNum = Integer.parseInt(modifiedCell);
catch(Exception e)
JOptionPane.showMessageDialog(null,"You may only enter numbers for a valid phone number to try again press the modify nutton again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
if(modifiedCell.length() > 10)
JOptionPane.showMessageDialog(null,"You may not enter a number longer than 10 characters long. Please press the modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
if((modifiedHome.length() <= 0) && (modifiedWork.length() <= 0) && (modifiedCell.length() <= 0))
JOptionPane.showMessageDialog(null,"The contact must have at least one number to be included in the phonebook. Please press modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
return;
for(Person z: phoneList)
z = phoneList.get(count1);
if((z.name).equals(modifiedName.trim().toUpperCase()) && (z.surname).equals(modifiedSurname.trim().toUpperCase()))
JOptionPane.showMessageDialog(null,"You may not enter duplicate contacts. Please try again.","Error",JOptionPane.ERROR_MESSAGE);
validModify = false;
modifyExisting();
return;
count1 ++;
if(validModify == true)
for(Person contactToMod: phoneList)/////////////////////////////////////////////////////// line 432
contactToMod = phoneList.get(count2);
if((contactToMod.name.equals(nameOfContactToEdit.trim().toUpperCase())) && (contactToMod.surname.equals(surnameOfContactToEdit.trim().toUpperCase())))
try
contactToMod.setName(modifiedName.trim().toUpperCase());
contactToMod.setSurname(modifiedSurname.trim().toUpperCase());
contactToMod.setHome(modifiedHome);
contactToMod.setWork(modifiedWork);
contactToMod.setCell(modifiedCell);
phoneList.add(contactToMod);
JOptionPane.showMessageDialog(null,"Updated contact succesfully.","Information",JOptionPane.INFORMATION_MESSAGE);
catch(Exception e)
JOptionPane.showMessageDialog(null,"The contact was not updated. If probelm persists please contact system administrator.","Error",JOptionPane.ERROR_MESSAGE);
count2 ++;
else
JOptionPane.showMessageDialog(null,"No contact with that name and surname exists. Please press the modify button to try again.","Error",JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(null,"The phone list is empty and there are no contacts to modify.","Information Message",JOptionPane.INFORMATION_MESSAGE);
}// End of modifyExisting()Edited by: Yucca on May 6, 2008 8:12 PM
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Icalender lost all data for last six months!
Not sure if this is linked to Davmail gateway which synchronizes my Ipad, Iphone and office or from any recent uploads onto the Ipad or Mac, but all my calendar entries have vanished except for Nov and Dec. All calenders are highlighted on the PC and
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I have passed the ID certification in app store in the settings though . I just can't download the programme as the ID certification doesn't show my ID.