From a3d3bbee3933d6d150f9504159eff6e5f208ee37 Mon Sep 17 00:00:00 2001 From: antelder Date: Mon, 20 Jun 2011 08:51:59 +0000 Subject: Add some experimental code to look at dynamic updates to a running Node git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1137548 13f79535-47bb-0310-9956-ffa450edef68 --- .../tuscany/sca/impl/hotupdate/HotUpdater.java | 111 +++++++++++++++++++++ .../sca/impl/hotupdate/LastModifiedTracker.java | 75 ++++++++++++++ 2 files changed, 186 insertions(+) create mode 100644 sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/HotUpdater.java create mode 100644 sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/LastModifiedTracker.java (limited to 'sca-java-2.x/trunk') diff --git a/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/HotUpdater.java b/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/HotUpdater.java new file mode 100644 index 0000000000..7369ab385b --- /dev/null +++ b/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/HotUpdater.java @@ -0,0 +1,111 @@ +/* + * 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 contributions = new HashMap(); + + 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 found = new HashSet(); + 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 removed = new HashSet(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(); + } + } +} diff --git a/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/LastModifiedTracker.java b/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/LastModifiedTracker.java new file mode 100644 index 0000000000..a129f4d0fe --- /dev/null +++ b/sca-java-2.x/trunk/modules/domain-node/src/main/java/org/apache/tuscany/sca/impl/hotupdate/LastModifiedTracker.java @@ -0,0 +1,75 @@ +/* + * 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; + +/** + * Keeps track of if a file or directory has been modified since a previous check + */ +public class LastModifiedTracker { + + private File targetFile; + private Long lastModified; + + public LastModifiedTracker(File targetFile) { + this.targetFile = targetFile; + checkModified(); + } + + public void reset() { + lastModified = null; + } + + public boolean checkModified() { + + long newLastModified = getNewLastModified(targetFile); + + if (lastModified == null) { + lastModified = newLastModified; + return false; + } + + if (newLastModified > lastModified) { + lastModified = newLastModified; + return true; + } + + return false; + } + + protected long getNewLastModified(File f) { + + if (!f.exists()) return 0; + + if (f.isFile()) return f.lastModified(); + + long newLastModified = f.lastModified(); + + for (File fx : f.listFiles()) { + long fxLastModified = getNewLastModified(fx); + if (fxLastModified > newLastModified){ + newLastModified = fxLastModified; + } + } + + return newLastModified; + } +} -- cgit v1.2.3