/*
* 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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import javax.annotation.concurrent.NotThreadSafe;
/**
* A stream for writing data to Swift API based object store.
*/
@NotThreadSafe
public class SwiftOutputStream extends OutputStream {
private static final Logger LOG = LoggerFactory.getLogger(SwiftOutputStream.class);
private OutputStream mOutputStream;
private HttpURLConnection mHttpCon;
/**
* Creates a new instance of {@link SwiftOutputStream}.
*
* @param httpCon connection to Swift
*/
public SwiftOutputStream(HttpURLConnection httpCon) throws IOException {
try {
mOutputStream = httpCon.getOutputStream();
mHttpCon = httpCon;
} 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 {
mOutputStream.close();
InputStream is = null;
try {
// Status 400 and up should be read from error stream
// Expecting here 201 Create or 202 Accepted
if (mHttpCon.getResponseCode() >= 400) {
LOG.error("Failed to write data to Swift with error code: " + mHttpCon.getResponseCode());
is = mHttpCon.getErrorStream();
} else {
is = mHttpCon.getInputStream();
}
is.close();
} catch (Exception e) {
LOG.error(e.getMessage());
if (is != null) {
is.close();
}
}
mHttpCon.disconnect();
}
@Override
public void flush() throws IOException {
mOutputStream.flush();
}
}