| /** |
| * 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.hadoop.hdfs.qjournal; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.qjournal.server.JournalNode; |
| import org.apache.hadoop.net.NetUtils; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.collect.Lists; |
| |
| public class MiniJournalCluster { |
| public static class Builder { |
| private String baseDir; |
| private int numJournalNodes = 3; |
| private boolean format = true; |
| private final Configuration conf; |
| |
| public Builder(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| public Builder baseDir(String d) { |
| this.baseDir = d; |
| return this; |
| } |
| |
| public Builder numJournalNodes(int n) { |
| this.numJournalNodes = n; |
| return this; |
| } |
| |
| public Builder format(boolean f) { |
| this.format = f; |
| return this; |
| } |
| |
| public MiniJournalCluster build() throws IOException { |
| return new MiniJournalCluster(this); |
| } |
| } |
| |
| private static final class JNInfo { |
| private JournalNode node; |
| private final InetSocketAddress ipcAddr; |
| private final String httpServerURI; |
| |
| private JNInfo(JournalNode node) { |
| this.node = node; |
| this.ipcAddr = node.getBoundIpcAddress(); |
| this.httpServerURI = node.getHttpServerURI(); |
| } |
| } |
| |
| private static final Log LOG = LogFactory.getLog(MiniJournalCluster.class); |
| private final File baseDir; |
| private final JNInfo[] nodes; |
| |
| private MiniJournalCluster(Builder b) throws IOException { |
| LOG.info("Starting MiniJournalCluster with " + |
| b.numJournalNodes + " journal nodes"); |
| |
| if (b.baseDir != null) { |
| this.baseDir = new File(b.baseDir); |
| } else { |
| this.baseDir = new File(MiniDFSCluster.getBaseDirectory()); |
| } |
| |
| nodes = new JNInfo[b.numJournalNodes]; |
| |
| for (int i = 0; i < b.numJournalNodes; i++) { |
| if (b.format) { |
| File dir = getStorageDir(i); |
| LOG.debug("Fully deleting JN directory " + dir); |
| FileUtil.fullyDelete(dir); |
| } |
| JournalNode jn = new JournalNode(); |
| jn.setConf(createConfForNode(b, i)); |
| jn.start(); |
| nodes[i] = new JNInfo(jn); |
| } |
| } |
| |
| /** |
| * Set up the given Configuration object to point to the set of JournalNodes |
| * in this cluster. |
| */ |
| public URI getQuorumJournalURI(String jid) { |
| List<String> addrs = Lists.newArrayList(); |
| for (JNInfo info : nodes) { |
| addrs.add("127.0.0.1:" + info.ipcAddr.getPort()); |
| } |
| String addrsVal = Joiner.on(";").join(addrs); |
| LOG.debug("Setting logger addresses to: " + addrsVal); |
| try { |
| return new URI("qjournal://" + addrsVal + "/" + jid); |
| } catch (URISyntaxException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| /** |
| * Start the JournalNodes in the cluster. |
| */ |
| public void start() throws IOException { |
| for (JNInfo info : nodes) { |
| info.node.start(); |
| } |
| } |
| |
| /** |
| * Shutdown all of the JournalNodes in the cluster. |
| * @throws IOException if one or more nodes failed to stop |
| */ |
| public void shutdown() throws IOException { |
| boolean failed = false; |
| for (JNInfo info : nodes) { |
| try { |
| info.node.stopAndJoin(0); |
| } catch (Exception e) { |
| failed = true; |
| LOG.warn("Unable to stop journal node " + info.node, e); |
| } |
| } |
| if (failed) { |
| throw new IOException("Unable to shut down. Check log for details"); |
| } |
| } |
| |
| private Configuration createConfForNode(Builder b, int idx) { |
| Configuration conf = new Configuration(b.conf); |
| File logDir = getStorageDir(idx); |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_EDITS_DIR_KEY, logDir.toString()); |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_RPC_ADDRESS_KEY, "localhost:0"); |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_KEY, "localhost:0"); |
| return conf; |
| } |
| |
| public File getStorageDir(int idx) { |
| return new File(baseDir, "journalnode-" + idx).getAbsoluteFile(); |
| } |
| |
| public File getJournalDir(int idx, String jid) { |
| return new File(getStorageDir(idx), jid); |
| } |
| |
| public File getCurrentDir(int idx, String jid) { |
| return new File(getJournalDir(idx, jid), "current"); |
| } |
| |
| public File getPreviousDir(int idx, String jid) { |
| return new File(getJournalDir(idx, jid), "previous"); |
| } |
| |
| public JournalNode getJournalNode(int i) { |
| return nodes[i].node; |
| } |
| |
| public void restartJournalNode(int i) throws InterruptedException, IOException { |
| JNInfo info = nodes[i]; |
| JournalNode jn = info.node; |
| Configuration conf = new Configuration(jn.getConf()); |
| if (jn.isStarted()) { |
| jn.stopAndJoin(0); |
| } |
| |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_RPC_ADDRESS_KEY, |
| NetUtils.getHostPortString(info.ipcAddr)); |
| |
| final String uri = info.httpServerURI; |
| if (uri.startsWith("http://")) { |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_HTTP_ADDRESS_KEY, |
| uri.substring(("http://".length()))); |
| } else if (info.httpServerURI.startsWith("https://")) { |
| conf.set(DFSConfigKeys.DFS_JOURNALNODE_HTTPS_ADDRESS_KEY, |
| uri.substring(("https://".length()))); |
| } |
| |
| JournalNode newJN = new JournalNode(); |
| newJN.setConf(conf); |
| newJN.start(); |
| info.node = newJN; |
| } |
| |
| public int getQuorumSize() { |
| return nodes.length / 2 + 1; |
| } |
| |
| public int getNumNodes() { |
| return nodes.length; |
| } |
| |
| } |