/* | |
* 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.tuscany.sca.impl.hotupdate; | |
import java.io.File; | |
import java.util.HashMap; | |
import java.util.HashSet; | |
import java.util.Map; | |
import java.util.Set; | |
import java.util.concurrent.Executors; | |
import java.util.concurrent.ScheduledExecutorService; | |
import java.util.concurrent.TimeUnit; | |
import org.apache.tuscany.sca.Node; | |
import org.apache.tuscany.sca.impl.NodeImpl; | |
/** | |
* Code to do dynamic updates to a running Node. | |
* Very experimental presently, mainly just to see what type of things are required | |
*/ | |
public class HotUpdater { | |
private final Node node; | |
private final File domainDir; | |
// key is contribution URI (which for exploded contributions is the directory name) | |
private final Map<String, LastModifiedTracker> contributions = new HashMap<String, LastModifiedTracker>(); | |
private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1); | |
public HotUpdater(Node node, File domainDir){ | |
this.node = node; | |
this.domainDir = domainDir; | |
final Runnable checker = new Runnable() { | |
public void run() { | |
check(); | |
} | |
}; | |
scheduler.scheduleAtFixedRate(checker, 10, 10, TimeUnit.SECONDS); | |
} | |
private void check() { | |
Set<String> found = new HashSet<String>(); | |
for (File f : domainDir.listFiles()) { | |
if (f.isDirectory() && !f.getName().startsWith(".")) { | |
found.add(f.getName()); | |
LastModifiedTracker scanner = contributions.get(f.getName()); | |
if (scanner == null) { | |
//newContribution(f); | |
contributions.put(f.getName(), new LastModifiedTracker(f)); | |
} else { | |
if (scanner.checkModified()) { | |
updatedContribution(f); | |
} | |
} | |
} | |
} | |
HashSet<String> removed = new HashSet<String>(contributions.keySet()); | |
removed.removeAll(found); | |
for (String curi : removed) { | |
removedContribution(curi); | |
} | |
} | |
private void removedContribution(String curi) { | |
try { | |
((NodeImpl)node).uninstallContribution(curi, true); | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
contributions.remove(curi); | |
} | |
private void updatedContribution(File f) { | |
try { | |
((NodeImpl)node).updateContribution(f.getName(), f.toURI().toURL().toString(), null, null); | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
} | |
private void newContribution(File f) { | |
try { | |
node.installContribution(f.getName(), f.toURI().toURL().toString(), null, null); | |
node.startDeployables(f.getName()); | |
} catch (Exception e) { | |
e.printStackTrace(); | |
} | |
} | |
} |