Re-organize the Launcher code a bit
Dave Syer
11 years ago
parent
e9fd7c96b8
commit
a70d293c87
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/*
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* Copyright 2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.boot.loader;
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import java.io.File;
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import java.net.URI;
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import java.security.CodeSource;
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import java.security.ProtectionDomain;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.logging.Logger;
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/**
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* Base class for launchers that can start an application with a fully configured
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* classpath.
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*
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* @author Phillip Webb
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* @author Dave Syer
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*/
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public abstract class AbstractLauncher implements ArchiveFilter {
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private Logger logger = Logger.getLogger(AbstractLauncher.class.getName());
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private LaunchHelper helper = new LaunchHelper();
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/**
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* Launch the application. This method is the initial entry point that should be
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* called by a subclass {@code public static void main(String[] args)} method.
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* @param args the incoming arguments
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*/
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public void launch(String[] args) {
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try {
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launch(args, getClass().getProtectionDomain());
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}
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catch (Exception ex) {
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ex.printStackTrace();
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System.exit(1);
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}
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}
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/**
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* Launch the application given the protection domain.
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* @param args the incoming arguments
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* @param protectionDomain the protection domain
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* @throws Exception
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*/
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protected void launch(String[] args, ProtectionDomain protectionDomain)
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throws Exception {
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CodeSource codeSource = protectionDomain.getCodeSource();
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URI location = (codeSource == null ? null : codeSource.getLocation().toURI());
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String path = (location == null ? null : location.getPath());
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if (path == null) {
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throw new IllegalStateException("Unable to determine code source archive");
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}
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File root = new File(path);
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if (!root.exists()) {
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throw new IllegalStateException(
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"Unable to determine code source archive from " + root);
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}
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Archive archive = (root.isDirectory() ? new ExplodedArchive(root)
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: new JarFileArchive(root));
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launch(args, archive);
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}
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/**
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* Launch the application given the archive file
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* @param args the incoming arguments
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* @param archive the underlying (zip/war/jar) archive
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* @throws Exception
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*/
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protected void launch(String[] args, Archive archive) throws Exception {
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List<Archive> lib = new ArrayList<Archive>();
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lib.addAll(this.helper.findNestedArchives(archive, this));
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this.logger.fine("Added " + lib.size() + " entries");
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postProcessLib(archive, lib);
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String mainClass = this.helper.getMainClass(archive);
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this.helper.launch(args, mainClass, lib);
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}
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/**
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* Called to post-process lib entries before they are used. Implementations can add
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* and remove entries.
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* @param archive the archive
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* @param lib the existing lib
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* @throws Exception
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*/
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protected void postProcessLib(Archive archive, List<Archive> lib) throws Exception {
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}
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}
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@ -0,0 +1,26 @@
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/*
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* Copyright 2012-2013 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.boot.loader;
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/**
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* @author Dave Syer
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*/
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public interface ArchiveFilter {
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public boolean isArchive(Archive.Entry entry);
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}
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