/*
* JBoss, Home of Professional Open Source.
* Copyright 2012, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.controller.remote;
import java.io.DataInput;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.jboss.as.controller.client.Operation;
import org.jboss.as.controller.client.impl.ModelControllerProtocol;
import org.jboss.as.protocol.StreamUtils;
import org.jboss.as.protocol.mgmt.AbstractManagementRequest;
import org.jboss.as.protocol.mgmt.ActiveOperation;
import org.jboss.as.protocol.mgmt.FlushableDataOutput;
import org.jboss.as.protocol.mgmt.ManagementChannelAssociation;
import org.jboss.as.protocol.mgmt.ManagementRequestContext;
import org.jboss.as.protocol.mgmt.ProtocolUtils;
import org.jboss.dmr.ModelNode;
/**
* An attachment proxy, lazily initializing the streams.
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
*/
class OperationAttachmentsProxy implements Operation {
private final ModelNode operation;
private final List<ProxiedInputStream> proxiedStreams;
private OperationAttachmentsProxy(final ModelNode operation, final List<ProxiedInputStream> proxiedStreams) {
this.operation = operation;
this.proxiedStreams = proxiedStreams;
}
static OperationAttachmentsProxy create(final ModelNode operation, final ManagementChannelAssociation channelAssociation, final int batchId, final int size) {
return new OperationAttachmentsProxy(operation, getProxiedStreams(channelAssociation, batchId, size));
}
private static List<ProxiedInputStream> getProxiedStreams(final ManagementChannelAssociation channelAssociation, final int batchId, final int size) {
List<ProxiedInputStream> proxiedStreams = new ArrayList<ProxiedInputStream>(size);
for (int i = 0; i < size; i++) {
proxiedStreams.add(new ProxiedInputStream(channelAssociation, batchId, i));
}
return proxiedStreams;
}
@Override
public boolean isAutoCloseStreams() {
return false;
}
@Override
public List<InputStream> getInputStreams() {
List<InputStream> result = new ArrayList<InputStream>();
result.addAll(proxiedStreams);
return Collections.unmodifiableList(result);
}
@Override
public void close() throws IOException {
//
}
void shutdown() {
for (final ProxiedInputStream stream : proxiedStreams) {
stream.shutdown(null);
}
}
@Override
public ModelNode getOperation() {
return operation;
}
@SuppressWarnings("CloneDoesntCallSuperClone")
@Override
@Deprecated
public final Operation clone() {
return new OperationAttachmentsProxy(operation, proxiedStreams);
}
@Override
@Deprecated
public Operation clone(ModelNode operation) {
return new OperationAttachmentsProxy(operation, proxiedStreams);
}
private static class ProxiedInputStream extends InputStream {
static final int BUFFER_SIZE = 8192;
private final int index;
private final int batchId;
private final Pipe pipe;
private final ManagementChannelAssociation channelAssociation;
private boolean initialized;
private volatile Throwable error;
ProxiedInputStream(final ManagementChannelAssociation channelAssociation, final int batchId, final int index) {
this.channelAssociation = channelAssociation;
this.batchId = batchId;
this.index = index;
pipe = new Pipe(BUFFER_SIZE);
}
@Override
public int read() throws IOException {
prepareForRead();
return pipe.getIn().read();
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
prepareForRead();
return pipe.getIn().read(b, off, len);
}
@Override
public void close() throws IOException {
IOException ex = null;
try {
pipe.getOut().close();
} catch (IOException e) {
ex = e;
}
try {
pipe.getIn().close();
} catch (IOException e) {
ex = e;
}
if (ex != null) {
throw ex;
}
}
private void prepareForRead() throws IOException {
initializeBytes();
throwIfError();
}
private void initializeBytes() {
if (!initialized) {
initialized = true;
try {
final OutputStream os = pipe.getOut();
// Execute the async request
channelAssociation.executeRequest(batchId, new AbstractManagementRequest<Object, Object>() {
@Override
public byte getOperationType() {
return ModelControllerProtocol.GET_INPUTSTREAM_REQUEST;
}
@Override
protected void sendRequest(ActiveOperation.ResultHandler<Object> resultHandler, ManagementRequestContext<Object> context, FlushableDataOutput output) throws IOException {
output.write(ModelControllerProtocol.PARAM_INPUTSTREAM_INDEX);
output.writeInt(index);
}
@Override
public void handleRequest(DataInput input, ActiveOperation.ResultHandler<Object> resultHandler, ManagementRequestContext<Object> context) throws IOException {
try {
ProtocolUtils.expectHeader(input, ModelControllerProtocol.PARAM_INPUTSTREAM_LENGTH);
final int size = input.readInt();
ProtocolUtils.expectHeader(input, ModelControllerProtocol.PARAM_INPUTSTREAM_CONTENTS);
final byte[] buffer = new byte[BUFFER_SIZE];
int totalRead = 0;
while (totalRead < size) {
int len = Math.min(size - totalRead, buffer.length);
input.readFully(buffer, 0, len);
os.write(buffer, 0, len);
totalRead += len;
}
os.close();
} catch (IOException e) {
shutdown(e);
throw e;
}
}
});
} catch (IOException e) {
shutdown(e);
}
}
}
private void throwIfError() throws IOException {
if (error != null) {
if (error instanceof IOException) {
throw (IOException) error;
}
throw new IOException(error);
}
}
private void shutdown(Throwable error) {
StreamUtils.safeClose(this);
this.error = error;
}
}
}