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Diffstat (limited to '')
-rw-r--r-- | sca-java-1.x/tags/1.5.1-RC2/modules/host-embedded/src/main/java/org/apache/tuscany/sca/host/embedded/impl/HotUpdatableSCADomain.java | 389 |
1 files changed, 0 insertions, 389 deletions
diff --git a/sca-java-1.x/tags/1.5.1-RC2/modules/host-embedded/src/main/java/org/apache/tuscany/sca/host/embedded/impl/HotUpdatableSCADomain.java b/sca-java-1.x/tags/1.5.1-RC2/modules/host-embedded/src/main/java/org/apache/tuscany/sca/host/embedded/impl/HotUpdatableSCADomain.java deleted file mode 100644 index d59f1544e5..0000000000 --- a/sca-java-1.x/tags/1.5.1-RC2/modules/host-embedded/src/main/java/org/apache/tuscany/sca/host/embedded/impl/HotUpdatableSCADomain.java +++ /dev/null @@ -1,389 +0,0 @@ -/* - * 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.host.embedded.impl; - -import java.io.File; -import java.io.FilenameFilter; -import java.io.IOException; -import java.io.InputStream; -import java.net.MalformedURLException; -import java.net.URISyntaxException; -import java.net.URL; -import java.net.URLClassLoader; -import java.util.ArrayList; -import java.util.Arrays; -import java.util.HashMap; -import java.util.List; -import java.util.logging.Logger; - -import org.apache.tuscany.sca.assembly.Composite; -import org.apache.tuscany.sca.assembly.builder.CompositeBuilderException; -import org.apache.tuscany.sca.contribution.Contribution; -import org.apache.tuscany.sca.contribution.service.ContributionService; -import org.apache.tuscany.sca.contribution.service.util.FileHelper; -import org.apache.tuscany.sca.core.assembly.ActivationException; -import org.apache.tuscany.sca.host.embedded.SCADomain; -import org.apache.tuscany.sca.host.embedded.management.ComponentManager; -import org.osoa.sca.CallableReference; -import org.osoa.sca.ServiceReference; -import org.osoa.sca.ServiceRuntimeException; - -/** - * An SCADomain that starts a Tuscany runtime supporting multiple - * SCA contribution jars. All contribution jars found in a repository - * directory will be contributed to the SCA domain. Any changes to the - * contributions in that repository will be automatically detected and - * the SCADomain updated accordingly. - * - * TODO: find how to properly add/remove contributions and start/activate the SCADomain - * TODO: support contributions that are folders as well as jar's - * TODO: needs to restart the entire SCADomain when a contribution changes - * as the domain classpath includes all the contribution jar's, would - * be nice to find a way to avoid this - * TODO: hot update requires copying contribution jars to a temp location - * to avoid the classpath lock preventing updating the contribution - * jars, would be nice to find a way to avoid that - * - * @version $Rev$ $Date$ - */ -public class HotUpdatableSCADomain extends SCADomain { - private static final Logger logger = Logger.getLogger(HotUpdatableSCADomain.class.getName()); - protected String domainURI; - protected File contributionRepository; - - protected EmbeddedSCADomain scaDomain; - - protected boolean hotUpdateActive; - protected Thread hotUpdateThread; - protected int hotUpdateInterval; // milliseconds, 0 = hotupdate disabled - - protected HashMap<URL, Long> existingContributions; // value is last modified time - protected ClassLoader originalCCL; - - protected static final String REPOSITORY_FOLDER = "sca-contributions"; - - public HotUpdatableSCADomain(String domainURI, File contributionRepository, int hotupdateInterval) { - this.domainURI = domainURI; - this.contributionRepository = contributionRepository; - this.hotUpdateInterval = hotupdateInterval; - this.originalCCL = Thread.currentThread().getContextClassLoader(); - start(); - } - - protected void start() { - try { - initEmbeddedSCADomain(); - activateHotUpdate(); - for (URL url : existingContributions.keySet()) { - File f = new File(url.toURI()); - logger.info("added contribution: " + f.getName()); - } - } catch (ActivationException e) { - throw new ServiceRuntimeException(e); - } catch (URISyntaxException e) { - throw new ServiceRuntimeException(e); - } - } - - @Override - public void close() { - try { - hotUpdateActive = false; - scaDomain.stop(); - } catch (ActivationException e) { - throw new ServiceRuntimeException(e); - } - Thread.currentThread().setContextClassLoader(originalCCL); - super.close(); - } - - - protected SCADomain initEmbeddedSCADomain() throws ActivationException { - - URL[] contributionJars = getContributionJarURLs(contributionRepository); - - this.existingContributions = getLastModified(contributionJars); - - if (hotUpdateInterval > 0) { - contributionJars = copyContributionsToTemp(contributionJars); - } - - // Using the CCL as the parent exposes Tuscany to the contributions, want to do this? - URLClassLoader cl = new URLClassLoader(contributionJars, originalCCL); - Thread.currentThread().setContextClassLoader(cl); - - scaDomain = new EmbeddedSCADomain(cl, domainURI); - - scaDomain.start(); - - initContributions(scaDomain, cl, contributionJars); - - return scaDomain; - } - - protected URL[] getContributionJarURLs(File repositoryDir) { - - String[] jars = repositoryDir.list(new FilenameFilter() { - public boolean accept(File dir, String name) { - return name.endsWith(".jar"); - }}); - - List<URL> contributionJars = new ArrayList<URL>(); - if (jars != null) { - for (String jar : jars) { - try { - contributionJars.add(new File(repositoryDir, jar).toURL()); - } catch (MalformedURLException e) { - throw new RuntimeException(e); - } - } - } - - return contributionJars.toArray(new URL[contributionJars.size()]); - } - - /** - * TODO: No idea what the 'correct' way to add/contribute and activate/start things to an scaDomain is - * but this seems to work. Doesn't seem to start <service>s or <reference>s which are outside of - * a <component> so something is missing/wrong. Also this doesn't seem to be picking up composites - * located in META-INF/deployables or specified in the sca-deployables.xml. Maybe the EmbeddedSCADomain - * and ContributionService APIs should make all this easier? - */ - protected void initContributions(EmbeddedSCADomain scaDomain, ClassLoader cl, URL[] contributionJars) { - Contribution contribution = null; - ContributionService contributionService = scaDomain.getContributionService(); - for (URL jar : contributionJars) { - InputStream is = null; - try { - is = jar.openStream(); - contribution = contributionService.contribute(jar.toString(), jar, is); - } catch (Exception e) { - System.err.println("exception adding contribution: " + jar); - e.printStackTrace(); - } - if (is != null) { - try { - is.close(); - } catch (IOException e) { - // ignore - } - } - } - - if (contribution != null ) { - try { - - for (Composite composite : contribution.getDeployables()) { - scaDomain.getDomainComposite().getIncludes().add(composite); - scaDomain.getCompositeBuilder().build(composite); - scaDomain.getCompositeActivator().activate(composite); - } - - for (Composite composite : contribution.getDeployables()) { - scaDomain.getCompositeActivator().start(composite); - } - - } catch (ActivationException e) { - throw new RuntimeException(e); - } catch (CompositeBuilderException e) { - throw new RuntimeException(e); - } - } - - } - - /** - * Copies Files to a temp location returning the URLs of the new temp files. - * For hot update to work need to be able to delete/update the contribution jar's - * but as they're in the classpath the URLClassLoader has an open lock on the jar's - * so you can't update them. This solution copies each contribution to a temp - * location for use on the classpath, nicer would be a ClassLoder impl that doesn't - * lock the jar's. - */ - protected URL[] copyContributionsToTemp(URL[] contributionJars) { - try { - - URL[] newURLs = new URL[contributionJars.length]; - File tempDir = new File(System.getProperty("java.io.tmpdir")); - for (int i=0; i<contributionJars.length; i++) { - File fin = new File(contributionJars[i].toURI()); - File fout = File.createTempFile("tuscany", fin.getName(), tempDir); - fout.deleteOnExit(); - FileHelper.copyFile(fin, fout); - fout.setLastModified(System.currentTimeMillis()); - newURLs[i] = fout.toURL(); - } - return newURLs; - - } catch (IOException e) { - throw new RuntimeException(e); - } catch (URISyntaxException e) { - throw new RuntimeException(e); - } - } - - /** - * Returns the last modified times of the files pointed to by the URLs - */ - protected HashMap<URL, Long> getLastModified(URL[] contrabutions) { - try { - - HashMap<URL, Long> contributionLastUpdates = new HashMap<URL, Long>(); - for (URL url: contrabutions) { - File f = new File(url.toURI()); - contributionLastUpdates.put(url, new Long(f.lastModified())); - } - return contributionLastUpdates; - - } catch (URISyntaxException e) { - throw new RuntimeException(e); - } - } - - protected void activateHotUpdate() { - if (hotUpdateInterval == 0) { - return; // hotUpdateInterval of 0 disables hotupdate - } - - Runnable runable = new Runnable() { - public void run() { - logger.info("Tuscany contribution hotupdate running"); - while (hotUpdateActive) { - try { - Thread.sleep(hotUpdateInterval); - } catch (InterruptedException e) { - } - if (hotUpdateActive) { - checkForUpdates(); - } - } - logger.info("Tuscany contribution hotupdate stopped"); - } - }; - hotUpdateThread = new Thread(runable, "TuscanyHotUpdate"); - hotUpdateActive = true; - hotUpdateThread.start(); - } - - - /** - * Checks if any of the contributions have been updated and if so restarts the SCADomain - * TODO: Ideally just the altered contribution would be restarted but thats not possible - * as the ClassLoader used by the SCADomain includes the old contribution so need - * to restart the entire domain to use a new ClassLoader. Should there be separate - * ClassLoader per contribution? But then have all the issues with sharing classes - * across contributions. - */ - protected void checkForUpdates() { - URL[] currentContributions = getContributionJarURLs(contributionRepository); - - if (areContributionsAltered(currentContributions)) { - try { - scaDomain.stop(); - } catch (Exception e) { - e.printStackTrace(); - } - try { - initEmbeddedSCADomain(); - } catch (Exception e) { - e.printStackTrace(); - } - } - } - - protected boolean areContributionsAltered(URL[] currentContrabutions) { - try { - - List addedContributions = getAddedContributions(currentContrabutions); - List removedContributions = getRemovedContributions(currentContrabutions); - List updatedContributions = getUpdatedContributions(currentContrabutions); - - return (addedContributions.size() > 0 || removedContributions.size() > 0 || updatedContributions.size() > 0); - - } catch (URISyntaxException e) { - throw new RuntimeException(e); - } - } - - protected List<URL> getUpdatedContributions(URL[] currentContrabutions) throws URISyntaxException { - List<URL> urls = new ArrayList<URL>(); - for (URL url : currentContrabutions) { - if (existingContributions.containsKey(url)) { - File curentFile = new File(url.toURI()); - if (curentFile.lastModified() != existingContributions.get(url)) { - urls.add(url); - logger.info("updated contribution: " + curentFile.getName()); - } - } - } - return urls; - } - - protected List getRemovedContributions(URL[] currentContrabutions) throws URISyntaxException { - List<URL> currentUrls = Arrays.asList(currentContrabutions); - List<URL> urls = new ArrayList<URL>(); - for (URL url : existingContributions.keySet()) { - if (!currentUrls.contains(url)) { - urls.add(url); - } - } - for (URL url : urls) { - logger.info("removed contributions: " + new File(url.toURI()).getName()); - } - return urls; - } - - protected List getAddedContributions(URL[] currentContrabutions) throws URISyntaxException { - List<URL> urls = new ArrayList<URL>(); - for (URL url : currentContrabutions) { - if (!existingContributions.containsKey(url)) { - urls.add(url); - logger.info("added contribution: " + new File(url.toURI()).getName()); - } - } - return urls; - } - - @Override - public <B, R extends CallableReference<B>> R cast(B target) throws IllegalArgumentException { - throw new UnsupportedOperationException("not implemented"); - } - - @Override - public <B> B getService(Class<B> businessInterface, String serviceName) { - return scaDomain.getService(businessInterface, serviceName); - } - - @Override - public <B> ServiceReference<B> getServiceReference(Class<B> businessInterface, String referenceName) { - return scaDomain.getServiceReference(businessInterface, referenceName); - } - - @Override - public String getURI() { - return domainURI; - } - - @Override - public ComponentManager getComponentManager(){ - return scaDomain.getComponentManager(); - } - -} |