hi You could look at this page[1]. I forgot I made it, might be something useful
Håkon [1] http://www.bccs.uni.no/~hakont/ws-samples/AsyncWSTutorial.html On 21 January 2011 15:21, James Oisin Flynn <[email protected]>wrote: > On further investigation, it appears to me that the asynchronous interface > on the client side is in actual fact no different from the synchronous > interface, other than the nicety of allowing the client to get on with doing > something else while its request is brewing. I had rather assumed that the > asynchronous client would somehow politely play byte ping pong with the > server side to keep the connection from timing out whilst the call was > executing. Is this the case? If so, does this simply imply that in order to > allow for an arbitrarily long call, it is only a matter of increasing to > timeout? > > Regards, > James. > > ------------------------------ > Date: Tue, 18 Jan 2011 15:35:42 +0100 > Subject: Re: Axis2: Difficulty/misunderstanding using axis2 asynchronous > calls > From: [email protected] > To: [email protected] > > > hi > > I had to add this line > > <parameter name="messageReceiver.invokeOnSeparateThread">true</parameter> > > In my services.xml, have you tried that? > > Håkon > > > > On 17 January 2011 16:57, James Oisin Flynn <[email protected]>wrote: > > > I am having difficulties getting an asynchronous axis2 client to work, very > possibly due to my misunderstanding of the way axis2 is supposed to work, > though I have not been able to find any analogous examples. > > I have a web service created in Eclipse using the bottom up approach. The > web service in question works fine synchronously, but really needs to > function asynchronously due to unpredictable latencies. The interface and > implementations of a part of this web service are the following > > Interface: > > @WebService > @SOAPBinding( style = Style.DOCUMENT ) > public interface DatabaseSource > { > @WebMethod > @WebResult( name = "TableColumns", targetNamespace = "http://rec.ws"; ) > public TableColumn[] reflectTable( > @WebParam( name = "SessionId", targetNamespace = "http://rec.ws"; ) > SessionId sessionId, > @WebParam( name = "DatabaseConfig", targetNamespace = "http://rec.ws"; ) > String sourceName, > @WebParam( name = "Table", targetNamespace = "http://rec.ws"; ) > String tableName ) throws SQLException, ReconciliationException; > } > > Implementation: > > public class DatabaseSourceWS implements DatabaseSource > { > private ReconciliationServices reconciliationServer; > public DatabaseSourceWS() > { > if ( reconciliationServer == null ) > { > reconciliationServer = ReconciliationServiceWS.getService(); > } > } > > public TableColumn[] > reflectTable( SessionId sessionId, String sourceName, String tableName ) > throws SQLException, ReconciliationException > { > ReconciliationServiceImpl service = > reconciliationServer.getSession( sessionId ); > database.isl.DatabaseSource source = > service.getSource( sourceName ); > Table table = service.getTable( tableName ); > if ( source != null && table != null ) > { > source.connect(); > source.reflectTable( table ); > return table.getColumns(); > } > return null; > } > } > > > The client is also built using Eclipse and Axis2 from the WSDL generated > when the service is generated. > The client, and it's callback handler are the following... > > The callback handler: > > private class SourceCallbackHandler extends DatabaseSourceWSCallbackHandler > implements Runnable > { > private SourceCallbackHandler() > { > Thread waitThread = new Thread( this ); > waitThread.start(); > } > > public void run() > { > synchronized ( this ) > { > try > { > this.wait(); > } > catch ( InterruptedException cont ) > {} > } > } > > private void continu() > { > synchronized ( this ) > { > this.notifyAll(); > } > } > > private TableColumn[] columns; > public void receiveResultreflectTable( ReflectTableResponse result ) > { > columns = result.get_return(); > continu(); > } > > public void receiveErrorreflectTable( java.lang.Exception e ) > { > e.printStackTrace(); > // throw a new exception and run continu() in finally clause. > continu(); > } > > public TableColumn[] getColumns() > { return columns; } > } > > > The client: > > public DatabaseSourceClient() > { > try > { > this.databaseSourceStub = new DatabaseSourceWSStub(); > } > catch ( AxisFault af ) > { > af.printStackTrace(); > } > } > > public void setSessionId( SessionId sessionId ) > { > this.sessionId = sessionId; > } > > public void setSourceConfig( DatabaseConfig sourceConfig ) > { > this.sourceConfig = sourceConfig; > } > > // .... > public void reflectTable( Table table ) throws SQLException > { > ReflectTable reflect = new ReflectTable(); > reflect.setSessionId( buildSession()); > reflect.setSourceName( sourceConfig.getSourceName()); > reflect.setTableName( table.getName()); > SourceCallbackHandler handler = new SourceCallbackHandler(); > try > { > synchronized ( handler ) > { > databaseSourceStub.startreflectTable( reflect, handler ); > handler.wait(); > } > } > catch ( RemoteException re ) > { > re.printStackTrace(); > } > catch ( InterruptedException cont ){} > if ( handler.getColumns() != null ) > { > setColumns( table, handler.getColumns()); > } > } > } > > > On execution, with the following code. The client successfully connects to > the web service. The web service successfully completes, and directly > returns the result of the operation, an array of columns, to the client. > However, the reply is somehow not received. The client sits in wait until > the socket times out, and then exits through the callback > handlers receiveErrorreflectTable( java.lang.Exception e ) method with the > following exception: > > org.apache.axis2.AxisFault: Read timed out > at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430) > at > org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:203) > at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:76) > at > org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:400) > at > org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:225) > at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:435) > at > org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:402) > at > org.apache.axis2.description.OutInAxisOperationClient$NonBlockingInvocationWorker.run(OutInAxisOperation.java:442) > at > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > at java.lang.Thread.run(Thread.java:619) > Caused by: java.net.SocketTimeoutException: Read timed out > at java.net.SocketInputStream.socketRead0(Native Method) > at java.net.SocketInputStream.read(SocketInputStream.java:129) > at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) > at java.io.BufferedInputStream.read(BufferedInputStream.java:237) > at > org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78) > at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106) > at > org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116) > at > org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413) > at > org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973) > at > org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735) > at > org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098) > at > org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398) > at > org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171) > at > org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397) > at > org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346) > at > org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:542) > at > org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:199) > ... > > Any help or suggestions would be welcome. > Cheers. > > >
