/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ha.framework.server;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.jboss.deployment.scanner.URLDeploymentScanner;
import org.jboss.ha.framework.interfaces.HAPartition;
import org.jboss.system.server.ServerConfig;
import org.jboss.system.server.ServerConfigLocator;
import org.jboss.system.server.ServerConfigUtil;
import org.jboss.ha.framework.server.ClusterFileTransfer.ClusterFileTransferException;
/**
*
* @author <a href="mailto:andreas@jboss.org">Andreas Schaefer</a>
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 57254 $
*
* <p><b>20021014 andreas schaefer:</b>
* <ul>
* <li>Initial import
* </ul>
* <p><b>20020809 bill burke:</b>
* <ul>
* <li>Rewrote as a Scanner instead. Also on boot-up asks cluster for deployable files
* </ul>
*/
public class FarmMemberService extends URLDeploymentScanner implements FarmMemberServiceMBean
{
private MBeanServer mServer;
protected ObjectName mDeployerName = null;
protected ObjectName mClusterPartitionName = null;
protected ClusterPartitionMBean mClusterPartition = null;
protected String mBackgroundPartition = ServerConfigUtil.getDefaultPartitionName();
private File mTempDirectory;
private ClusterFileTransfer mFileTransfer;
protected final static String SERVICE_NAME = "FarmMemberService";
protected HashMap parentDUMap = new HashMap();
protected ArrayList remotelyDeployed = new ArrayList ();
protected ArrayList remotelyUndeployed = new ArrayList ();
public String getPartitionName()
{
return mBackgroundPartition;
}
public void setPartitionName( String pPartitionName )
{
if( ( getState () != STARTED ) && ( getState () != STARTING ) )
{
mBackgroundPartition = pPartitionName;
}
}
public ClusterPartitionMBean getClusterPartition()
{
return mClusterPartition;
}
public void setClusterPartition(ClusterPartitionMBean clusterPartition)
{
if( ( getState () != STARTED ) && ( getState () != STARTING ) )
{
this.mClusterPartition = clusterPartition;
}
}
/** Backward compatibility, mapped to the URLs attribute of URLDeploymentScannerMBean
* @deprecated
*/
public void setFarmDeployDirectory(String urls)
throws MalformedURLException
{
super.setURLs(urls);
}
/** Backward compatibility, but ignored as it does nothing.
* @deprecated
*/
public void setScannerName(String name)
{
log.warn("ScannerName does nothing");
}
public void setDeployer(ObjectName deployerName)
{
super.setDeployer(deployerName);
// Cache the deployer name so we can reset it in case of restart
this.mDeployerName = deployerName;
}
// Service implementation ----------------------------------------
public String getName()
{
return "Farm Member Service";
}
/**
* Saves the MBeanServer reference, create the Farm Member Name and
* add its Notification Listener to listen for Deployment / Undeployment
* notifications from the {@link org.jboss.deployment.MainDeployer MainDeployer}.
*/
public ObjectName preRegister( MBeanServer pServer, ObjectName pName )
throws Exception
{
mServer = pServer;
return super.preRegister(pServer, pName);
}
/**
* Looks up the Server Config instance to figure out the
* temp-directory and the farm-deploy-directory
**/
protected void createService() throws Exception
{
// AbstractDeploymentScanner drops ref to the deployer in destroyService(),
// so if this is a "re-create" following a destroy, reestablish it
if (deployer == null && mDeployerName != null)
setDeployer(mDeployerName); // causes JMX lookup of deployer
super.createService();
ServerConfig lConfig = ServerConfigLocator.locate();
mTempDirectory = lConfig.getServerTempDir();
createUnexistingLocalDir ();
}
/**
* Register itself as RPC-Handler to the HA-Partition
* and add the farm deployment directory to the scanner
**/
protected void startService()
throws Exception
{
try
{
log.debug( "registerRPCHandler" );
HAPartition lHAPartition = null;
if (mClusterPartition != null)
{
lHAPartition = mClusterPartition.getHAPartition();
mBackgroundPartition = lHAPartition.getPartitionName();
}
mClusterPartitionName = new ObjectName( "jboss:service=" + mBackgroundPartition );
if (lHAPartition == null)
{
// Old style config with PartitionName was used -- have to
// look up the partition in JMX
lHAPartition = (HAPartition) mServer.getAttribute(
mClusterPartitionName,
"HAPartition"
);
}
lHAPartition.registerRPCHandler( SERVICE_NAME, this );
mFileTransfer = new ClusterFileTransfer(lHAPartition, buildParentFolderMapping());
ArrayList response = lHAPartition.callMethodOnCoordinatorNode(
SERVICE_NAME,
"farmDeployments",
new Object[] {}, new Class[] {},
true
);
log.debug("Found "+response.size()+" farmDeployments responses");
for (int i = 0; i < response.size(); i++)
{
Object map = response.get(i);
if ( map != null && map instanceof HashMap )
{
HashMap farmed = (HashMap) map;
pullNewDeployments(lHAPartition, farmed);
}
}
// scan before we enable the thread, so JBoss version shows up afterwards
scannerThread.doScan();
// enable scanner thread if we are enabled
scannerThread.setEnabled(isScanEnabled());
}
catch(Exception e)
{
this.logException(e);
throw e;
}
}
protected void pullNewDeployments(HAPartition partition, HashMap farmed)
{
log.info("**** pullNewDeployments ****");
Iterator it = farmed.keySet().iterator();
while (it.hasNext())
{
String depName = (String)it.next();
DeployedURL du = (DeployedURL)parentDUMap.get(depName);
Date last = (Date)farmed.get(depName);
if (du != null)
{
Date theLast = new Date(du.getFile().lastModified());
if (!theLast.before(last))
{
continue;
}
}
String parentName = depName.substring(0, depName.indexOf('/'));
File destFile = new File(depName);
try
{
mFileTransfer.pull(destFile,parentName);
synchronized (remotelyDeployed)
{
remotelyDeployed.add (destFile.getName());
}
}
catch(ClusterFileTransferException e)
{
// log the exception and continue with the next deployment
this.logException(e);
}
}
}
// return mapping of Farming folder names to the File
private Map buildParentFolderMapping()
{
Map map = new HashMap();
URL[] urls = (URL[]) urlList.toArray( new URL[] {} );
for (int i = 0; i < urlList.size(); i++)
{
if (urls[i].getProtocol().equals("file"))
{
File file = new File(urls[i].getFile());
if (file.isDirectory())
{
map.put(file.getName(),file);
}
}
}
return map;
}
protected File findParent(String parentName)
{
URL[] urls = (URL[]) urlList.toArray( new URL[] {} );
for (int i = 0; i < urlList.size(); i++)
{
if (urls[i].getProtocol().equals("file"))
{
File file = new File(urls[i].getFile());
if (file.isDirectory())
{
if (file.getName().equals(parentName)) return file;
}
}
}
return null;
}
public HashMap farmDeployments()
{
log.debug("farmDeployments request, parentDUMap.size="+parentDUMap.size());
Iterator it = parentDUMap.keySet().iterator();
HashMap farmed = new HashMap();
while(it.hasNext())
{
String key = (String)it.next();
DeployedURL du = (DeployedURL)parentDUMap.get(key);
farmed.put(key, new Date(du.getFile().lastModified()));
}
return farmed;
}
public void farmDeploy( String parentName, File destFile, Date date )
{
try
{
File parent = findParent(parentName);
if (parent == null)
{
log.info("Could not find parent: " + parentName + " for deployment: " + destFile + ", data: " + date);
return;
}
String fullName = parentName + "/" + destFile.getName();
DeployedURL du = null;
synchronized(parentDUMap)
{
du = (DeployedURL)parentDUMap.get(fullName);
}
boolean deployIt = false;
if (du == null)
{
deployIt = true;
}
else
{
Date lastChanged = new Date(du.getFile().lastModified());
deployIt = lastChanged.before(date);
}
if (deployIt)
{
// we remember this deployment to avoid recursive farm calls!
//
synchronized (remotelyDeployed)
{
remotelyDeployed.add (fullName);
}
log.info( "farmDeployment(), deploy locally: " + fullName );
// Adjust the date and move the file to /farm
// but delete it first if already there
File tempFile = new File(this.mTempDirectory, destFile.getName() );
File lFarmFile = new File(parent,destFile.getName());
if( lFarmFile.exists() ) {
if(!lFarmFile.delete()) {
log.info("could not delete target file for farm deployment "+ lFarmFile.getName());
}
}
tempFile.setLastModified( date.getTime() );
if(! ClusterFileTransfer.localMove(tempFile,lFarmFile ))
{
log.info("Could not move "+tempFile+" to " + lFarmFile);
}
}
else
{
log.info(fullName + " is already deployed by farm service on this node");
}
}
catch( Exception e ) {
logException( e );
}
}
public void farmUndeploy(String parentName, String fileName)
{
try {
// First check if file is already deployed
log.info( "doUndeployment(), File: " + parentName + "/" + fileName);
File parent = findParent(parentName);
if (parent == null)
{
log.info("Could not find parent: " + parentName + " for undeployment: " + fileName);
return;
}
File deployed = new File(parent, fileName);
if (deployed.exists())
{
// we remember this undeployment to avoid recursive farm calls!
//
synchronized (remotelyUndeployed)
{
String fullName = parentName + "/" + fileName;
remotelyUndeployed.add (fullName);
}
if(deployed.delete())
log.info( "farmUndeployment(), removed file " + deployed );
else
log.info( "farmUndeployment(), could not remove file " + deployed );
}
}
catch( Exception e ) {
logException( e );
}
}
protected void deploy(final DeployedURL du)
{
super.deploy(du);
File file = du.getFile();
File parent = file.getParentFile();
if (parent == null) return;
String fullName = parent.getName() + "/" + file.getName();
synchronized (parentDUMap)
{
parentDUMap.put(fullName, du);
}
try
{
// We check if we must do a remote call or not: maybe the deploy
// is already the consequence of a farm call! (avoid recusivity!)
//
boolean consequenceOfRemoteCall = false;
synchronized (remotelyDeployed)
{
consequenceOfRemoteCall = remotelyDeployed.remove (fullName);
}
if (getState() == STARTING) return;
if (!consequenceOfRemoteCall)
{
Date fileDate = new Date(file.lastModified());
HAPartition lHAPartition = (HAPartition) mServer.getAttribute(
mClusterPartitionName,
"HAPartition"
);
this.mFileTransfer.push(file, parent.getName(), true);
lHAPartition.callMethodOnCluster(
SERVICE_NAME,
"farmDeploy",
new Object[] {parent.getName(), file, fileDate},
new Class[] {String.class, File.class, Date.class},
true
);
}
}
catch (ClusterFileTransferException e)
{
logException(e);
}
catch (Exception ex)
{
logException(ex);
}
}
protected void undeploy(final DeployedURL du)
{
File file = du.getFile();
File parent = file.getParentFile();
String parentName = parent.getName();
String fileName = file.getName();
super.undeploy(du);
String fullName = parent.getName() + "/" + file.getName();
synchronized (parentDUMap)
{
parentDUMap.remove(fullName);
}
if (getState() == STOPPING) return;
try
{
// We check if we must do a remote call or not: maybe the undeploy
// is already the consequence of a farm call! (avoid recusivity!)
//
boolean consequenceOfRemoteCall = false;
synchronized (remotelyUndeployed)
{
consequenceOfRemoteCall = remotelyUndeployed.remove (fullName);
}
if (!consequenceOfRemoteCall)
{
HAPartition lHAPartition = (HAPartition) mServer.getAttribute(
mClusterPartitionName,
"HAPartition"
);
lHAPartition.callMethodOnCluster(
SERVICE_NAME,
"farmUndeploy",
new Object[] {parentName, fileName},
new Class[] {String.class, String.class},
true
);
}
}
catch (Exception ex)
{
logException(ex);
}
}
/**
* Go through the myriad of nested JMX exception to pull out the true
* exception if possible and log it.
*
* @param e The exception to be logged.
*/
private void logException( Throwable e )
{
if (e instanceof javax.management.RuntimeErrorException)
{
e = ((javax.management.RuntimeErrorException)e).getTargetError();
}
else if (e instanceof javax.management.RuntimeMBeanException)
{
e = ((javax.management.RuntimeMBeanException)e).getTargetException();
}
else if (e instanceof javax.management.RuntimeOperationsException)
{
e = ((javax.management.RuntimeOperationsException)e).getTargetException();
}
else if (e instanceof javax.management.MBeanException)
{
e = ((javax.management.MBeanException)e).getTargetException();
}
else if (e instanceof javax.management.ReflectionException)
{
e = ((javax.management.ReflectionException)e).getTargetException();
}
log.error(e);
}
protected void createUnexistingLocalDir()
{
if (this.urlList != null)
{
Iterator iter = this.urlList.iterator ();
while (iter.hasNext ())
{
URL url = null;
try
{
url = (URL)iter.next ();
if (url.getProtocol().equals("file"))
{
File targetDir = new File (url.getFile ());
if (!targetDir.exists ())
targetDir.mkdirs ();
}
}
catch (Exception e)
{
log.info ("Problem while creating a farm directory: " + url, e);
}
}
}
}
}
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