org.apache.druid.storage.cloudfiles.CloudFilesByteSource Maven / Gradle / Ivy
/*
* 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.druid.storage.cloudfiles;
import com.google.common.base.Throwables;
import com.google.common.io.ByteSource;
import org.jclouds.io.Payload;
import java.io.IOException;
import java.io.InputStream;
public class CloudFilesByteSource extends ByteSource
{
private final CloudFilesObjectApiProxy objectApi;
private final String path;
private Payload payload;
public CloudFilesByteSource(CloudFilesObjectApiProxy objectApi, String path)
{
this.objectApi = objectApi;
this.path = path;
this.payload = null;
}
public void closeStream() throws IOException
{
if (payload != null) {
payload.close();
payload = null;
}
}
@Override
public InputStream openStream() throws IOException
{
return openStream(0);
}
public InputStream openStream(long start) throws IOException
{
payload = (payload == null) ? objectApi.get(path, start).getPayload() : payload;
try {
return payload.openStream();
}
catch (IOException e) {
if (CloudFilesUtils.CLOUDFILESRETRY.apply(e)) {
throw new IOException("Recoverable exception", e);
}
throw Throwables.propagate(e);
}
}
}