/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.underfs.swift;
import alluxio.util.io.PathUtils;
import org.javaswift.joss.model.Account;
import org.javaswift.joss.model.Container;
import org.javaswift.joss.model.StoredObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.UUID;
import javax.annotation.concurrent.NotThreadSafe;
/**
* A stream for writing data to an in-memory simulated Swift client. The data will be written to a
* file in a temporary directory and written out all at once.
*/
@NotThreadSafe
public class SwiftMockOutputStream extends OutputStream {
private static final Logger LOG = LoggerFactory.getLogger(SwiftMockOutputStream.class);
private final File mFile;
private final OutputStream mOutputStream;
private final String mObjectName;
private final Account mAccount;
private final String mContainerName;
/** Flag to indicate if this stream has been closed, to ensure close is only done once. */
private boolean mClosed = false;
/**
* Creates a new instance of {@link SwiftMockOutputStream}.
*
* @param account simulated Swift account
* @param containerName container name
* @param objectName name of file or folder to write
*/
public SwiftMockOutputStream(Account account, String containerName, String objectName)
throws IOException {
try {
mAccount = account;
mContainerName = containerName;
mObjectName = objectName;
mFile = new File(PathUtils.concatPath("/tmp", UUID.randomUUID()));
mOutputStream = new BufferedOutputStream(new FileOutputStream(mFile));
} catch (Exception e) {
LOG.error(e.getMessage());
throw new IOException(e);
}
}
@Override
public void write(int b) throws IOException {
mOutputStream.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
mOutputStream.write(b, off, len);
}
@Override
public void write(byte[] b) throws IOException {
mOutputStream.write(b);
}
@Override
public void close() throws IOException {
if (mClosed) {
return;
}
mOutputStream.close();
try {
Container container = mAccount.getContainer(mContainerName);
StoredObject object = container.getObject(mObjectName);
object.uploadObject(mFile);
} catch (Exception e) {
throw new IOException(e);
}
// Close successful
mClosed = true;
}
@Override
public void flush() throws IOException {
mOutputStream.flush();
}
}