/*
* 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.brooklyn.core.mgmt.persist.jclouds;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import org.apache.brooklyn.core.mgmt.persist.PersistenceObjectStore;
import org.apache.brooklyn.util.exceptions.Exceptions;
import org.apache.commons.io.Charsets;
import org.jclouds.blobstore.BlobStore;
import org.jclouds.blobstore.domain.Blob;
import org.jclouds.util.Strings2;
import com.google.common.base.Throwables;
import com.google.common.io.ByteSource;
import com.google.common.io.ByteStreams;
/**
* @author Andrea Turli
*/
public class JcloudsStoreObjectAccessor implements PersistenceObjectStore.StoreObjectAccessor {
private final BlobStore blobStore;
private final String containerName;
private final String blobName;
public JcloudsStoreObjectAccessor(BlobStore blobStore, String containerName, String blobNameOptionallyWithPath) {
this.blobStore = blobStore;
this.containerName = containerName;
this.blobName = blobNameOptionallyWithPath;
}
@Override
public boolean exists() {
return blobStore.blobExists(containerName, blobName);
}
@Override
public void put(String val) {
if (val==null) val = "";
blobStore.createContainerInLocation(null, containerName);
// seems not needed, at least not w SoftLayer
// blobStore.createDirectory(containerName, directoryName);
ByteSource payload = ByteSource.wrap(val.getBytes(Charsets.UTF_8));
Blob blob;
try {
blob = blobStore.blobBuilder(blobName).payload(payload)
.contentLength(payload.size())
.build();
} catch (IOException e) {
throw Throwables.propagate(e);
}
blobStore.putBlob(containerName, blob);
}
@Override
public void append(String val) {
String val0 = get();
if (val0==null) val0="";
if (val==null) val="";
put(val0+val);
}
@Override
public void delete() {
blobStore.removeBlob(containerName, blobName);
}
@Override
public String get() {
try {
Blob blob = blobStore.getBlob(containerName, blobName);
if (blob==null) return null;
return Strings2.toStringAndClose(blob.getPayload().openStream());
} catch (IOException e) {
Exceptions.propagateIfFatal(e);
throw new IllegalStateException("Error reading blobstore "+containerName+" "+blobName+": "+e, e);
}
}
@Override
public byte[] getBytes() {
try {
Blob blob = blobStore.getBlob(containerName, blobName);
if (blob==null) return null;
ByteArrayOutputStream out = new ByteArrayOutputStream();
InputStream in = blob.getPayload().openStream();
try {
ByteStreams.copy(in, out);
return out.toByteArray();
} finally {
out.close();
}
} catch (IOException e) {
Exceptions.propagateIfFatal(e);
throw new IllegalStateException("Error reading blobstore "+containerName+" "+blobName+": "+e, e);
}
}
@Override
public Date getLastModifiedDate() {
Blob blob = blobStore.getBlob(containerName, blobName);
if (blob==null) return null;
return blob.getMetadata().getLastModified();
}
}