/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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.asakusafw.windgate.hadoopfs.ssh;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.asakusafw.runtime.core.context.RuntimeContext;
import com.asakusafw.runtime.io.util.VoidOutputStream;
import com.asakusafw.windgate.core.WindGateLogger;
import com.asakusafw.windgate.hadoopfs.HadoopFsLogger;
/**
* Puts files onto Hadoop File System from {@link FileList} in the standard input.
* @since 0.2.2
* @version 0.4.0
*/
public class WindGateHadoopPut extends WindGateHadoopBase {
static final WindGateLogger WGLOG = new HadoopFsLogger(WindGateHadoopPut.class);
static final Logger LOG = LoggerFactory.getLogger(WindGateHadoopPut.class);
private static final int BUFFER_SIZE = 1024 * 1024;
private final Configuration conf;
/**
* Creates a new instance.
* @param conf the configuration
* @throws IllegalArgumentException if some parameters were {@code null}
*/
public WindGateHadoopPut(Configuration conf) {
if (conf == null) {
throw new IllegalArgumentException("conf must not be null"); //$NON-NLS-1$
}
this.conf = conf;
}
/**
* Program entry.
* This requires {@link FileList} protocol in standard input.
* @param args must be empty
*/
public static void main(String[] args) {
RuntimeContext.set(RuntimeContext.DEFAULT.apply(System.getenv()));
RuntimeContext.get().verifyApplication(WindGateHadoopPut.class.getClassLoader());
WGLOG.info("I21000");
long start = System.currentTimeMillis();
Configuration conf = new Configuration();
int result = new WindGateHadoopPut(conf).execute(StdioHelper.getOriginalStdin(), args);
long end = System.currentTimeMillis();
WGLOG.info("I21999", result, end - start);
System.exit(result);
}
int execute(InputStream in, String... args) {
assert args != null;
if (args.length != 0) {
WGLOG.error("E21001",
Arrays.asList(args));
System.err.printf("usage: java -classpath ... %s%n",
WindGateHadoopPut.class.getName());
return 1;
}
try {
WGLOG.info("I21001");
FileList.Reader reader = FileList.createReader(new BufferedInputStream(in, BUFFER_SIZE));
doPut(reader);
WGLOG.info("I21002");
reader.close();
return 0;
} catch (IOException e) {
WGLOG.info(e, "I21002");
return 1;
}
}
void doPut(FileList.Reader source) throws IOException {
assert source != null;
FileSystem fs = FileSystem.get(conf);
while (source.next()) {
FileStatus status = source.getCurrentFile();
InputStream input = source.openContent();
try {
doPut(fs, status, input);
} finally {
input.close();
}
}
}
private void doPut(FileSystem fs, FileStatus status, InputStream input) throws IOException {
assert fs != null;
assert status != null;
assert input != null;
WGLOG.info("I21003",
fs.getUri(),
status.getPath());
long transferred = 0;
OutputStream output;
if (RuntimeContext.get().isSimulation()) {
output = new VoidOutputStream();
} else {
output = fs.create(status.getPath(), true, BUFFER_SIZE);
}
try {
byte[] buf = new byte[256];
while (true) {
int read = input.read(buf);
if (read < 0) {
break;
}
output.write(buf, 0, read);
transferred += read;
}
} finally {
output.close();
}
WGLOG.info("I21004",
fs.getUri(),
status.getPath(),
transferred);
}
}