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/* |
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Copyright @ 1999-2003, The Institute for Genomic Research (TIGR). |
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All rights reserved. |
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*/ |
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/* |
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* $RCSfile: Communicator.java,v $ |
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* $Revision: 1.4 $ |
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* $Date: 2006/02/23 21:00:01 $ |
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* $Author: caliente $ |
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* $State: Exp $ |
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*/ |
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package org.tigr.remote.protocol.communication.http; |
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|
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import org.tigr.remote.RemoteException; |
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import org.tigr.remote.communication.ClientCommunicator; |
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import org.tigr.remote.communication.JobControl; |
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import org.tigr.remote.protocol.FinishedJob; |
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import org.tigr.remote.protocol.Request; |
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import org.tigr.remote.protocol.Response; |
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import org.tigr.remote.protocol.StartingJob; |
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import org.tigr.remote.protocol.StopJob; |
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import org.tigr.remote.protocol.communication.Presentation; |
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import org.tigr.util.ConfMap; |
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|
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public class Communicator implements ClientCommunicator { |
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|
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private ConfMap m_conf; |
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private Presentation m_presentation; |
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private int i = 0; |
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|
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/** |
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* Constructs a <code>Communicator</code> with specified configuration. |
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*/ |
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public Communicator(ConfMap conf) throws RemoteException { |
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m_conf = conf; |
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m_presentation = new Presentation( conf, new HttpTransport( conf ) ); |
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} |
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|
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/** |
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* Starts a remote execution. |
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* @return the JobControl of a started job. |
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*/ |
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public JobControl postJob( StartingJob job ) throws RemoteException { |
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Request req = new Request( job ); |
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m_presentation.sendRequest( req ); |
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return new SyncJobControl( this, job.getId(), m_conf.getInt("remote.polling", 10) ); |
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} |
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|
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/** |
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* Returns result of a remote execution. |
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*/ |
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protected FinishedJob getResult() throws RemoteException { |
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Response response = m_presentation.getResponse(); |
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return response.getJob(); |
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} |
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|
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/** |
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* Returns unique identifier for a new job. |
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*/ |
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public String getNewJobId() { return ++i + "";} |
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|
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/** |
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* Class to control synchronized communication. |
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*/ |
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private class SyncJobControl implements JobControl { |
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|
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private Communicator m_comm; |
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private String m_jobId; |
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private int m_polling; |
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private FinishedJob m_result = null; |
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|
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/** |
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* Constructs a <code>SyncJobControl</code> for specified communicator, |
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* id and polling parameter. |
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* @param polling the polling interval in seconds. |
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*/ |
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public SyncJobControl( Communicator comm, String id, int polling ) { |
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m_comm = comm; |
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m_jobId = id; |
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m_polling = polling; |
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} |
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|
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/** |
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* Waiting for a server reply. |
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*/ |
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private void waitForReply() throws RemoteException { |
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while (m_result == null) { |
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try { |
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Thread.sleep( m_polling*1000 ); |
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} catch (InterruptedException e) { |
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throw new RemoteException("Thread was interrupted", e); |
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} |
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m_result = m_comm.getResult(); |
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} |
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} |
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|
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/** |
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* Sends an instance of <code>StopJob</code> to a server. |
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*/ |
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public void terminate() throws RemoteException { |
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m_comm.postJob( new StopJob( getJobId() ) ); |
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} |
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|
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/** |
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* Returns the result of remote execution. |
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*/ |
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public FinishedJob getResult() throws RemoteException { |
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waitForReply(); |
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if (m_result == null) |
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throw new RemoteException("No result available"); |
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FinishedJob result = m_result; |
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m_result = null; |
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return result; |
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} |
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|
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/** |
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* Returns job unique identifier. |
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*/ |
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private String getJobId() { return m_jobId;} |
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} |
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} |
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