/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.ode.axis2.deploy;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.axis2.ODEServer;
import javax.xml.namespace.QName;
import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.Collection;
/**
* Polls a directory for the deployment of a new deployment unit.
*/
public class DeploymentPoller {
private static Log __log = LogFactory.getLog(DeploymentPoller.class);
/** The polling interval. */
private static final long POLL_TIME = 3000;
private File _deployDir;
private PollingThread _poller;
private ODEServer _odeServer;
private boolean _onHold = false;
/** Filter accepting directories containing a .odedd file. */
private static final FileFilter _fileFilter = new FileFilter() {
public boolean accept(File path) {
if (path.isDirectory()) {
return path.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.toLowerCase().equals("deploy.xml");
}
}).length == 1;
} else
return false;
}
};
/** Filter accepting *.deployed files. */
private static final FileFilter _deployedFilter = new FileFilter() {
public boolean accept(File path) {
return path.isFile() && path.getName().endsWith(".deployed");
}
};
public DeploymentPoller(File deployDir, ODEServer odeServer) {
_odeServer = odeServer;
_deployDir = deployDir;
if (!_deployDir.exists())
_deployDir.mkdir();
}
public void start() {
_poller = new PollingThread();
_poller.start();
__log.info("Poller started.");
}
public void stop() {
_poller.kill();
_poller = null;
}
/**
* Scan the directory for new (or removed) files (called mainly from {@link PollingThread}) and calls whoever is in charge of
* the actual deployment (or undeployment).
*/
private void check() {
File[] files = _deployDir.listFiles(_fileFilter);
// Checking for new deployment directories
for (File file : files) {
File deployXml = new File(file, "deploy.xml");
File deployedMarker = new File(_deployDir, file.getName() + ".deployed");
if (!deployXml.exists()) {
// Skip if deploy.xml is abset
__log.debug("Not deploying " + file + " (missing deploy.xml)");
}
if (deployedMarker.exists()) {
continue;
}
try {
deployedMarker.createNewFile();
} catch (IOException e1) {
__log.error("Error creating deployed marker file, " + file + " will not be deployed");
continue;
}
try {
_odeServer.getProcessStore().undeploy(file);
} catch (Exception ex) {
__log.error("Error undeploying " + file.getName());
}
try {
Collection<QName> deployed = _odeServer.getProcessStore().deploy(file);
__log.info("Deployment of artifact " + file.getName() + " successful: " + deployed );
} catch (Exception e) {
__log.error("Deployment of " + file.getName() + " failed, aborting for now.", e);
}
}
// Removing deployments that disappeared
File[] deployed = _deployDir.listFiles(_deployedFilter);
for (File file : deployed) {
String pkg = file.getName().substring(0, file.getName().length() - ".deployed".length());
File deployDir = new File(_deployDir, pkg);
if (!deployDir.exists()) {
Collection<QName> undeployed = _odeServer.getProcessStore().undeploy(deployDir);
file.delete();
if (undeployed.size() > 0)
__log.info("Successfully undeployed " + pkg);
}
}
}
/**
* Thread that does the actual polling for new files.
*/
private class PollingThread extends Thread {
private boolean _active = true;
/** Stop this poller, and block until it terminates. */
void kill() {
synchronized (this) {
_active = false;
this.notifyAll();
}
try {
join();
} catch (InterruptedException ie) {
__log.fatal("Thread unexpectedly interrupted.", ie);
}
}
public void run() {
try {
while (_active) {
if (!_onHold)
check();
synchronized (this) {
try {
this.wait(POLL_TIME);
} catch (InterruptedException e) {
}
}
}
} catch (Throwable t) {
__log.fatal("Encountered an unexpected error. Exiting poller...", t);
}
}
}
public void hold() {
_onHold = true;
}
public void release() {
_onHold = false;
}
public void markAsDeployed(File file) {
File deployedMarker = new File(_deployDir, file.getName() + ".deployed");
try {
deployedMarker.createNewFile();
} catch (IOException e) {
__log.error("Couldn't create marker file for " + file.getName());
}
}
public void markAsUndeployed(File file) {
File deployedMarker = new File(_deployDir, file.getName() + ".deployed");
deployedMarker.delete();
}
}