/*
* Copyright 2014, Stratio.
*
* Licensed 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 com.stratio.deep.cassandra.embedded;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.db.commitlog.CommitLog;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.io.util.FileUtils;
import org.apache.cassandra.service.CassandraDaemon;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.apache.thrift.transport.TTransportException;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.Session;
import com.google.common.base.Charsets;
import com.google.common.io.Files;
import com.google.common.io.Resources;
import com.stratio.deep.commons.utils.Constants;
/**
* Embedded Cassandra Server helper class.
*/
public class CassandraServer {
private class CassandraRunner implements Runnable {
@Override
public void run() {
cassandraDaemon = new CassandraDaemon();
cassandraDaemon.activate();
cassandraDaemon.start();
}
}
public static final int CASSANDRA_THRIFT_PORT = 9360;
public static final int CASSANDRA_CQL_PORT = 9242;
private static final Logger logger = Logger.getLogger(CassandraServer.class);
private static final int WAIT_SECONDS = 4;
private static void cleanup() throws IOException {
// clean up commitlog
String[] directoryNames = { DatabaseDescriptor.getCommitLogLocation(), };
for (String dirName : directoryNames) {
File dir = new File(dirName);
if (!dir.exists()) {
logger.error("No such directory: " + dir.getAbsolutePath());
throw new RuntimeException("No such directory: " + dir.getAbsolutePath());
}
FileUtils.deleteRecursive(dir);
}
// clean up data directory which are stored as data directory/table/data
// files
for (String dirName : DatabaseDescriptor.getAllDataFileLocations()) {
File dir = new File(dirName);
if (!dir.exists()) {
logger.error("No such directory: " + dir.getAbsolutePath());
throw new RuntimeException("No such directory: " + dir.getAbsolutePath());
}
FileUtils.deleteRecursive(dir);
}
}
private static void cleanupAndLeaveDirs() throws IOException {
mkdirs();
cleanup();
mkdirs();
CommitLog.instance.resetUnsafe(); // cleanup screws w/ CommitLog, this
// brings it back to safe state
}
/**
* Copies a resource from within the jar to a directory.
*
* @param resource
* @param directory
* @throws IOException
*/
private static void copy(String resource, String directory) throws IOException {
mkdir(directory);
InputStream is = CassandraServer.class.getResourceAsStream(resource);
String fileName = resource.substring(resource.lastIndexOf("/") + 1);
File file = new File(directory + System.getProperty("file.separator") + fileName);
OutputStream out = new FileOutputStream(file);
byte buf[] = new byte[1024];
int len;
while ((len = is.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.close();
is.close();
}
/**
* Creates a directory
*
* @param dir
* @throws IOException
*/
private static void mkdir(String dir) throws IOException {
FileUtils.createDirectory(dir);
}
private static void mkdirs() {
DatabaseDescriptor.createAllDirectories();
}
private final String yamlFilePath;
private CassandraDaemon cassandraDaemon;
private String[] startupCommands;
static ExecutorService executor = Executors.newSingleThreadExecutor();
public CassandraServer() {
this("/cassandra.yaml");
}
public CassandraServer(String yamlFile) {
this.yamlFilePath = yamlFile;
}
public String[] getStartupCommands() {
return startupCommands;
}
private void initKeySpace() {
if (startupCommands == null || startupCommands.length == 0) {
return;
}
Cluster cluster = Cluster.builder().withPort(CASSANDRA_CQL_PORT)
.addContactPoint(Constants.DEFAULT_CASSANDRA_HOST).build();
try (Session session = cluster.connect()) {
for (String command : startupCommands) {
try {
if (StringUtils.isNotEmpty(command)) {
session.execute(command);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public void setStartupCommands(String[] startupCommands) {
this.startupCommands = startupCommands;
}
public void shutdown() throws IOException {
executor.shutdown();
executor.shutdownNow();
}
/**
* Set embedded cassandra up and spawn it in a new thread.
*
* @throws TTransportException
* @throws IOException
* @throws InterruptedException
*/
public void start() throws IOException, InterruptedException, ConfigurationException {
File dir = Files.createTempDir();
String dirPath = dir.getAbsolutePath();
logger.info("Storing Cassandra files in " + dirPath);
URL url = Resources.getResource("cassandra.yaml");
String yaml = Resources.toString(url, Charsets.UTF_8);
yaml = yaml.replaceAll("REPLACEDIR", dirPath);
String yamlPath = dirPath + File.separatorChar + "cassandra.yaml";
org.apache.commons.io.FileUtils.writeStringToFile(new File(yamlPath), yaml);
// make a tmp dir and copy cassandra.yaml and log4j.properties to it
try {
copy("/log4j.properties", dir.getAbsolutePath());
} catch (Exception e1) {
logger.error("Cannot copy log4j.properties");
}
System.setProperty("cassandra.config", "file:" + dirPath + yamlFilePath);
System.setProperty("log4j.configuration", "file:" + dirPath + "/log4j.properties");
System.setProperty("cassandra-foreground", "true");
System.setProperty("cassandra.skip_wait_for_gossip_to_settle", "0");
cleanupAndLeaveDirs();
try {
executor.execute(new CassandraRunner());
} catch (RejectedExecutionException e) {
logger.error(e);
return;
}
try {
TimeUnit.SECONDS.sleep(WAIT_SECONDS);
} catch (InterruptedException e) {
logger.error(e);
throw new AssertionError(e);
}
initKeySpace();
}
}