Advice Required : Unusual website client request.
Hello,
This isn't a joke!
I have been asked by a client to build a website that satisfies the following criteria.
1. All webpages must end with .html
2. The webpages must not require any particular web technology behind the scenes to work.
3. It's fine if website requires javascript.
They have some good reasons for this.
1. If all the webpages end with .html then any future change in backend technology would not adversely effect search engine indexing.
2. Similar to 1 in that they don't want changes in back-end technology to require any significant change in the existing html.
I have a rough idea how to deliver this and I would welcome any advice or comments anyone may care to offer.
My plan is to...
1. Develop the server side of things using java - but not .jsp's
2. Develop the client side of things using html and javascript so ending in .html
3. Connect the server and client side using AJAX approach, so seperating client from server.
Is this a foolish approach or am I thinking along the right lines?
Is there a java technology I should use?
Thanks
Edited by: RedBoffin on Aug 27, 2008 6:50 AM
RedBoffin wrote:
Hello Steve,
Thanks for your thoughts.
re: #2. They are more concerned that there (client-side) web pages are 'clean' of any (server-side) code. I think what they mean is that say their website was made using JSP/Servlets and then (for some reason) they wanted to switch to .NET, then they want (ideally) such a change to have almost zero impact on the client-side web pages.This could mean two things:
1) The code sent to the client is pure HTML/Javascript
2) The code that makes up the View is pure HTML/Javascript
If 1) then a full use of JSP is no problem, because JSPs generate regular HTML, nothing special about it.
But the JSP would be the View, so if they want 2) then you would not be able to use JSPs. You would end up doing a lot more work and use a lot more servlet code to do what essentially JSPs already do.
>
Mapping .html as you suggest in order to continue using JSP's is really interesting. I have just set up a sandpit java web app using SSI filter mapped to .html, so that #include virtual="" can be used in the html to import headers, footers, nav links, javascript files, etc. Maybe your suggestion is a simpler approach?
What do you think?I think using JSPs for this is the better choice, because you get a lot more functionality and a lot simpler/easier to maintain code.
Coding for a maybe change to a completely different architecture is a nightmare. From the client perspective I agree, searched/bookmarked pages should the same, and with a well designed View layer, this is no problem. But the server-side should leverage the entire servlet architecture or is a waste.
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I hope this helps
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apply a proper Jar file.
"Brian McLoughlin" <[email protected]> wrote:
>
I'm currently attempting to wrap a custom control in a jpd file for the
added benefits
of a Java process. The problem I'm encountering is due to the fact that
the control
I'm using takes file content as input (I'm currently using the DataHandler
type,
since this is how attachments are transferred to/from the client using
jws files).
I've set the process up so that the client request has an argument of
type javax.activation.DataHandler.
When working with jws files, this was sufficient allow the service to
accept
a SOAP attachment. When I try to set this up through a process, however,
I get
the following error: "java.lang.ClassCastException: javax.activation.DataHandler".
This error occurred when I invoked the process as a web service via
the BEA-generated
client proxy jar.
Is there a different way of utilizing SOAP attachments with jpd files,
or am I
simply missing another step?
Thanks.
-Brian -
Jpd client requests with attachments
I'm currently attempting to wrap a custom control in a jpd file for the added benefits
of a Java process. The problem I'm encountering is due to the fact that the control
I'm using takes file content as input (I'm currently using the DataHandler type,
since this is how attachments are transferred to/from the client using jws files).
I've set the process up so that the client request has an argument of type javax.activation.DataHandler.
When working with jws files, this was sufficient allow the service to accept
a SOAP attachment. When I try to set this up through a process, however, I get
the following error: "java.lang.ClassCastException: javax.activation.DataHandler".
This error occurred when I invoked the process as a web service via the BEA-generated
client proxy jar.
Is there a different way of utilizing SOAP attachments with jpd files, or am I
simply missing another step?
Thanks.
-BrianHi Brian,
This sounds like a known bug. Could you take this issue up with our
award winning support team [1] and reference CR129731.
Thanks,
Bruce
[1]
http://support.bea.com
[email protected]
Brian McLoughlin wrote:
>
I'm currently attempting to wrap a custom control in a jpd file for the added benefits
of a Java process. The problem I'm encountering is due to the fact that the control
I'm using takes file content as input (I'm currently using the DataHandler type,
since this is how attachments are transferred to/from the client using jws files).
I've set the process up so that the client request has an argument of type javax.activation.DataHandler.
When working with jws files, this was sufficient allow the service to accept
a SOAP attachment. When I try to set this up through a process, however, I get
the following error: "java.lang.ClassCastException: javax.activation.DataHandler".
This error occurred when I invoked the process as a web service via the BEA-generated
client proxy jar.
Is there a different way of utilizing SOAP attachments with jpd files, or am I
simply missing another step?
Thanks.
-Brian -
Kadmin: Missing parameters in krb5.conf required for kadmin client while in
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When i am going to run commands like
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thanks a lotHi,
It is a common problem. I used Oracle Linux to sort it out.
Perhaps you're using the wrong command? AFAIK kadmin should be used when working remotely. You don't say where you are in relation to the server? If sitting at the server you should be using kadmin.local. For example if I issue:
sudo kadmin.local
I get:
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If I issue:
sudo kadmin
I get:
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If I issue:
sudo kadmin
I get:
Authenticating as principal root/[email protected] with password.
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A vital difference. Issuing:
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If you have any questions, ask.
Kirill Babeyev -
Method names on "Client Request with Return" nodes
I wasn't sure whether this question would be better here, or in the "integration"
group. The traffic there is somewhat lighter than in here, so perhaps someone
is more likely to read it here :) .
I have two questions about the "method name" in a "Client Request with Return"
node in a Java Process Definition. Apparently the method name is exposed in the
WSDL. I can sort of understand what this method name is used for in the "request"
node, but I fail to understand what the method name corresponds to in the "reply/response"
node of the pair of two nodes. Why does this need to expose a method name in
the WSDL when the point of the node is just to send back a response to the original
request?
Second, in the "Guide to Building Business Processes" document, in the section
titled "Naming the Methods on Client Request with Return Nodes" (page 3-14 in
my copy), the last sentence says "The name must be a valid Java class name".
Is this true? That confuses me.What do you think is happening here? Specifically if a socket is a connected and a new one comes in. What then?
private void listen() {
try {
clientSocket = serverSocket.accept();
} catch (IOException e) {
e.printStackTrace();
} -
How can I have my servlet accept 100 concurrent client requests?
My servlet extends HttpServlet so it is multithreaded. Then I have written a java
client which starts 100 concurrent threads that try to contact the servlet.
There are always lots of threads which are refused by the Weblogic Server 6.0.
They get a 'Connection refused' exception. Sometimes there are 50 refused connections,
sometimes there are 0 refused connections (not very often), sometimes there are
80 refused connections (usually).
I have checked the 'Servlet' documentation and the 'J2EE Design Considerations
for Weblogic Server' which recommends not to exceede the execute thread count
number of 15. I have not changed that value, I do not even know if it still exists
in Weblogic 6.0 as the document refers to the 5.0 version.
Does anybody know how to solve this problem? How can I have the client requests
waiting rather than being refused? Of course the main goal is to serve all the
client requests, not to refuse.
This is the code that the client thread uses to contact the servlet:
URL url = new URL("http://localhost:7001/examplesWebApp/myServlet");
URLConnection conn = url.openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
DataOutputStream os = new DataOutputStream(conn.getOutputStream());
os.writeBytes()
os.writeBytes()
Thanks for your time,
David
The key is
KKEY_LOCALMACHINE\SYSTEM\CurrentControlSet\Services\TCPIP\Parameters
There you may need add a value "MaxUserPort" as REG_DWORD (5000 is default), also
change "TcpTimedWaitDelay" to small number (30 is minimum). You may have trouble
to find them. Just add them.
You can also use Microsoft Web Application Stress Tool to test your Weblogic applications.
As a free test tool, it is really powerful, although not so flexible.
I guess you write your own test tool with java.net.URLConnection. I am not sure
about the power of this class. In my case, I wrote my stress test tools with Java
Socket. I can test application on Weblogic 6 with 1000 threads with my own tool
and Microsoft tool, depending on memory and CPU of the machines I use. I run my
tests on both Windows 2000 professional and Solaris.
Check your CPU and memory usage with task manager.
On the other hand, you should check log message on Weblogic 6. Try to turn on
HTTP debug by add the following in your config.xml in tag <Server>.
<ServerDebug DebugHttp="true" DebugURLResolution="true"
JDBCConn="true" JDBCSQL="true" ListenThreadDebug="true" Name="myserver"/>
"David Ruana" <[email protected]> wrote:
>
>Xiang, I really appreciate your help. I changed my Weblogic server configuration
>from the console but I still experience the same problems.
>
>I start my 100 threads, and from about the 20th onward all them get the
>'Connection
>refused' exception in the URLConnection::getOutputStream() function,
>always after
>a successful URLConnection::openConnetion().
>
>My system is Windows 2000 Professional (Spanish version). I tried to
>check the
>open client socket descriptor limit but I was not able to find the TCPIP/MAXUSERPORT
>in the registry. Do you know how is this entry called in Windows 2000?
>
>At this point I am not sure whether my problems are related to the Weblogic
>server
>or to the operative system. I will keep trying... I would appreciate
>any other
>suggestion.
>
>Thank you very much.
>
>
>
>"Xiang Rao" <[email protected]> wrote:
>>
>>It is better to use Weblogic 6 console to configure Weblogic server.
>>In the console,
>>there is tab Servers->myServer->Congiguration->Tuning, you can find
>execute
>>length
>>and backlog.
>>
>>If you use Windows as test client, note Windows have a 5000 open client
>>socket
>>descriptors limit. You need change Windows Registry (TCPIP/MAXUSERPORT)
>>to change
>>this parameter.
>>
>>On the other hand, during test, you should monitor your test via Weblogic
>>console
>>(myServer->Monitoring->Performance), here you can see the change of
>wait
>>queue.
>>If the queue keeps increaing, you are in trouble.
>>
>>Since you know how to use MBean, try to write customized (servlet, for
>>example)
>>to collect the following data: opened socket number, open socket number,
>>opened
>>session number and open session number. The two "open" numbers will
>give
>>you some
>>clue. Also record your CPU and memory usage.
>>
>>BTW, what is the output you get from your test in terms of number of
>>requests
>>per second, response time and number of bytes downloaded/uplodaed per
>>second?
>>Are your test client and Weblogic running on the same machine?
>>
>>
>>
>>"David Ruana" <[email protected]> wrote:
>>>
>>>By the way, this is a piece of the config.xml file where you can see
>>>my Server
>>>configuration. It is the configuration which is installed in the examplesServer
>>>in the free evaluation of Weblogic 6.0. I only modified the AcceptBacklog
>>>value,
>>>and added the ThreadPoolSize="15" line which was missing (I copied
>from
>>>the petstoreServer).
>>>
>>> <Server AcceptBacklog="1000" AdministrationPort="0" ClusterWeight="1"
>>> ConsoleInputEnabled="false" DGCIdlePeriodsUntilTimeout="2"
>>> DefaultProtocol="t3" DefaultSecureProtocol="t3s"
>>> HttpdEnabled="true" JavaCompiler="C:\bea\jdk130/bin/javac"
>>> ListenPort="7001" Name="examplesServer" NativeIOEnabled="true"
>>> ThreadPoolSize="15"
>>> SocketReaderTimeoutMaxMillis="10"
>>> TransactionLogFilePrefix="config/examples/logs/"
>>> TunnelingClientPingSecs="45" TunnelingClientTimeoutSecs="40"
>>>XMLRegistry="examplesXMLRegistry">
>>> <ServerDebug Name="examplesServer"/>
>>> <WebServer DefaultWebApp="DefaultWebApp_examplesServer"
>>> LogFileName="./config/examples/logs/access.log"
>>> LoggingEnabled="true" Name="examplesServer"/>
>>> <Log FileName="./config/examples/logs/weblogic.log" Name="examplesServer"/>
>>> <KernelDebug Name="examplesServer"/>
>>> <SSL Enabled="true" ListenPort="7002" Name="examplesServer"
>>> PeerValidationEnforced="0"
>>> ServerCertificateChainFileName="./config/examples/ca.pem"
>>> ServerCertificateFileName="./config/examples/democert.pem"
>>> ServerKeyFileName="./config/examples/demokey.pem" TrustedCAFileName="./config/examples/ca.pem"/>
>>> </Server>
>>>
>>>
>>>
>>>
>>>
>>>"Xiang Rao" <[email protected]> wrote:
>>>>
>>>>You only need to change Weblogic HTTP configuration. Give the server
>>>>a big socket
>>>>Backlog number. Since you test with 100 threads, you can think 1000
>>>to
>>>>5000, i.e.,
>>>>1000 to 5000 requests will be in queue before got served. Aslo, you
>>>might
>>>>need
>>>>to change your OS TCP/IP settings (both test clients and servers),
>>such
>>>>as maximum
>>>>number of sockets and timeout value(so closed sockets will release
>>socket
>>>>descriptors
>>>>immediately).
>>>>
>>>>On the other hand, the number of executive threads can be much larger
>>>>than 15
>>>>(50-200 is a normal number), depending on the features of your application.
>>>>You
>>>>can try your stress test tools to find a reasonable number by analyzing
>>>>the relationships
>>>>among (throughtput, response time, number of executive threads, etc).
>>>>
>>>>
>>>>"David Ruana" <[email protected]> wrote:
>>>>>
>>>>>My servlet extends HttpServlet so it is multithreaded. Then I have
>>>written
>>>>>a java
>>>>>client which starts 100 concurrent threads that try to contact the
>>>servlet.
>>>>>
>>>>>There are always lots of threads which are refused by the Weblogic
>>>Server
>>>>>6.0.
>>>>>They get a 'Connection refused' exception. Sometimes there are 50
>>refused
>>>>>connections,
>>>>>sometimes there are 0 refused connections (not very often), sometimes
>>>>>there are
>>>>>80 refused connections (usually).
>>>>>
>>>>>I have checked the 'Servlet' documentation and the 'J2EE Design Considerations
>>>>>for Weblogic Server' which recommends not to exceede the execute
>thread
>>>>>count
>>>>>number of 15. I have not changed that value, I do not even know if
>>>it
>>>>>still exists
>>>>>in Weblogic 6.0 as the document refers to the 5.0 version.
>>>>>
>>>>>Does anybody know how to solve this problem? How can I have the client
>>>>>requests
>>>>>waiting rather than being refused? Of course the main goal is to
>serve
>>>>>all the
>>>>>client requests, not to refuse.
>>>>>
>>>>>This is the code that the client thread uses to contact the servlet:
>>>>>
>>>>>URL url = new URL("http://localhost:7001/examplesWebApp/myServlet");
>>>>>URLConnection conn = url.openConnection();
>>>>>conn.setDoInput(true);
>>>>>conn.setDoOutput(true);
>>>>>
>>>>>DataOutputStream os = new DataOutputStream(conn.getOutputStream());
>>>>>os.writeBytes()
>>>>>os.writeBytes()
>>>>>...
>>>>>
>>>>>Thanks for your time,
>>>>>David
>>>>>
>>>>
>>>
>>
>
-
WebLogic is not responding to client request under heavy load
Under heavy loading, our WLS 6.0 SP2 will be not be responding to client requests
after some time, say, 1 hour. From the administration console, the request throughput
is 0 while request waiting accumulates to over 1,000. Even the clients stop making
request to the server, the request waiting will not drop. It seems that WLS blocked
on some threads and unable to serve the requests (see attached thread dump for
details).
Our configuration is as follow:
OS: SunOS 5.7
Database: MS SQL Server 7.0 running on NT4 Enterprise Edition.
(JDBC Driver is the one bundled with WLS 6.0)
We know that using 'DriverManager.getConnection()' can cause deadlock in number
of cases but we have gone through all the code but all of our Database connections
are obtained through datasource. And the connection is closed properly in finally
block.
Moreover, the application is originally running on WLS 4.51 but no problem is
encountered.
Does any expert know what the problem and solution are?
Thanks!
[session.log]It appears that some threads were possibly blocked at some jDriver calls
initially (ExecuteThread 0,10,15,23 of the default thread pool). WLS JTA
subsequently timed out and rolled back the transactions asynchronously. The
first rollback attempt was blocked at the jDriver level (ExecuteThread 18 of
the default thread pool). Each subsequent rollback retry blocks an
additional execute thread (due to a JTA bug that is fixed in WLS 6.1, but
not 6.0 SPs) - ExecuteThread 1-9,11-26 of the default thread pool.
Eventually, the server ran out of execute threads and became unresponsive.
It is unclear that whether the initial blocking of threads by the jDriver is
a jDriver issue or an application issue. Please report to BEA support at
[email protected] for further assistance.
Regards,
Priscilla
Gary Mok <[email protected]> wrote in message
news:[email protected]..
>
Under heavy loading, our WLS 6.0 SP2 will be not be responding to clientrequests
after some time, say, 1 hour. From the administration console, the requestthroughput
is 0 while request waiting accumulates to over 1,000. Even the clientsstop making
request to the server, the request waiting will not drop. It seems thatWLS blocked
on some threads and unable to serve the requests (see attached thread dumpfor
details).
Our configuration is as follow:
OS: SunOS 5.7
Database: MS SQL Server 7.0 running on NT4 Enterprise Edition.
(JDBC Driver is the one bundled with WLS 6.0)
We know that using 'DriverManager.getConnection()' can cause deadlock innumber
of cases but we have gone through all the code but all of our Databaseconnections
are obtained through datasource. And the connection is closed properly infinally
block.
Moreover, the application is originally running on WLS 4.51 but no problemis
encountered.
Does any expert know what the problem and solution are?
Thanks! -
Hi there.
I have been asked to produce a website and there are a few areas that I'm wondering how I can do so I just thought I would post and see if anyone on here could possibly give me some advice.
The website will contain a search facility that will allow the user to search on a number of different locations across the county, by the postcode.
I'm not sure how to do this really.
Basically, there needs to be an individual page for each location and on it, they will have the name of the place, the address including postcode, an image and a few paragraphs with a description.
Could this all be stored in a database do you think? (I’ve never stored images in a database).
If so... how do I store images.
And, when the text is in paragraphs, I presume it will all be in one field in the database, so how would it be formatted properly on the website.
Finally, how can I do a postcode search, that will return the locations that are ‘near’ to the postcode entered.
If anyone has got any advice, or can point me to a good tutorial, I would really appreciate it.
Thanks so much,
CraigAnswering in reverse order...
You would have to look at any major retailer's site .... They all ask for a zip code and a a radius and they will show all of the stores. I am sure there are tables somewhere that relate postal codes with one another. I have never needed them, so I can offer no further guidance. Google something like zip code proximity table, any you might find something. As I said, I don't think it's a trivial operation.
If your database record contains one entry per zip, then you use that zip as your index and you get one record returned. When you display that record you would show the text and the image, etc for that zip. If you have multiple stores per zip, then you would return multiple records and for each one you would show that info. All would be done on one page, whether one or many records.
Look at DW Master/Destail pages.
It would be a little more complicated to have the child page just return the list of locations and that list could have links to the individual detail pages. This would create unnecessary pages in those cases where there was only a single entry and that could be annoying to people who wanted to go straight to the results.
To get Google to go directly to the individual pages would be difficult. You could manually create separate pages but the maintenance overhead would, I think, be astronomical. A well-designed master page with mention of states or areas could go a long way to getting attention.
Hope this answers your questions.
Barry -
A December 2, 2013 Apple FAQ says that you can go to Mavericks:Safari:Preferences:Passwords and select "Allow AutoFill even for websites that request passwords not be saved."
However, this checkbox does not appear.
The features and management of iCloud Keychain are causing concern among users.
I share these. For example, today I chose to let Safari produce a complex password for a Chase credit card site. Yet, when I went back to that site to sign in, I could not. Nor was that password in the list on Safari!
This is not good. For iCloud Keychain to be trusted, it must be very reliable, and we must be allowed to manage it.
I was forced to reset the password for Chase, and had to refuse Safari's offer to use their suggested password (as I would possibly never see it again!)Safari version 7.0.4
That option is no more available.
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