/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.jboss.as.controller.client.impl;
import java.io.DataInput;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.jboss.as.controller.client.MessageSeverity;
import org.jboss.as.controller.client.ModelControllerClient;
import org.jboss.as.controller.client.Operation;
import org.jboss.as.controller.client.OperationBuilder;
import org.jboss.as.controller.client.OperationMessageHandler;
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.ManagementProtocol;
import org.jboss.as.protocol.mgmt.ManagementRequest;
import org.jboss.as.protocol.mgmt.ManagementRequestContext;
import org.jboss.as.protocol.mgmt.ManagementRequestHandler;
import org.jboss.as.protocol.mgmt.ManagementRequestHandlerFactory;
import org.jboss.as.protocol.mgmt.ManagementRequestHeader;
import org.jboss.as.protocol.mgmt.ManagementResponseHeader;
import static org.jboss.as.protocol.mgmt.ProtocolUtils.expectHeader;
import org.jboss.dmr.ModelNode;
import org.jboss.threads.AsyncFuture;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
*/
public abstract class AbstractModelControllerClient implements ModelControllerClient, ManagementRequestHandlerFactory {
private static ManagementRequestHandler<ModelNode, OperationExecutionContext> MESSAGE_HANDLER = new HandleReportRequestHandler();
private static ManagementRequestHandler<ModelNode, OperationExecutionContext> GET_INPUT_STREAM = new ReadAttachmentInputStreamRequestHandler();
private static final OperationMessageHandler NO_OP_HANDLER = OperationMessageHandler.DISCARD;
/**
* Get the mgmt channel association.
*
* @return the channel association
* @throws IOException
*/
protected abstract ManagementChannelAssociation getChannelAssociation() throws IOException;
@Override
public ModelNode execute(final ModelNode operation) throws IOException {
return executeForResult(OperationExecutionContext.create(operation));
}
@Override
public ModelNode execute(final Operation operation) throws IOException {
return executeForResult(OperationExecutionContext.create(operation));
}
@Override
public ModelNode execute(final ModelNode operation, final OperationMessageHandler messageHandler) throws IOException {
return executeForResult(OperationExecutionContext.create(operation, messageHandler));
}
@Override
public ModelNode execute(Operation operation, OperationMessageHandler messageHandler) throws IOException {
return executeForResult(OperationExecutionContext.create(operation, messageHandler));
}
@Override
public AsyncFuture<ModelNode> executeAsync(final ModelNode operation, final OperationMessageHandler messageHandler) {
try {
return execute(OperationExecutionContext.create(operation, messageHandler));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public AsyncFuture<ModelNode> executeAsync(final Operation operation, final OperationMessageHandler messageHandler) {
try {
return execute(OperationExecutionContext.create(operation, messageHandler));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public ManagementRequestHandler<?, ?> resolveHandler(RequestHandlerChain handlers, ManagementRequestHeader header) {
final byte operationType = header.getOperationId();
if (operationType == ModelControllerProtocol.HANDLE_REPORT_REQUEST) {
return MESSAGE_HANDLER;
} else if (operationType == ModelControllerProtocol.GET_INPUTSTREAM_REQUEST) {
return GET_INPUT_STREAM;
}
return handlers.resolveNext();
}
/**
* Execute for result.
*
* @param executionContext the execution context
* @return the result
* @throws IOException for any error
*/
private ModelNode executeForResult(final OperationExecutionContext executionContext) throws IOException {
try {
return execute(executionContext).get();
} catch(Exception e) {
throw new IOException(e);
}
}
/**
* Execute a request.
*
* @param executionContext the execution context
* @return the future result
* @throws IOException
*/
private AsyncFuture<ModelNode> execute(final OperationExecutionContext executionContext) throws IOException {
return executeRequest(new AbstractManagementRequest<ModelNode, OperationExecutionContext>() {
@Override
public byte getOperationType() {
return ModelControllerProtocol.EXECUTE_ASYNC_CLIENT_REQUEST;
}
@Override
protected void sendRequest(final ActiveOperation.ResultHandler<ModelNode> resultHandler,
final ManagementRequestContext<OperationExecutionContext> context,
final FlushableDataOutput output) throws IOException {
// Write the operation
final List<InputStream> streams = executionContext.operation.getInputStreams();
final ModelNode operation = executionContext.operation.getOperation();
int inputStreamLength = 0;
if (streams != null) {
inputStreamLength = streams.size();
}
output.write(ModelControllerProtocol.PARAM_OPERATION);
operation.writeExternal(output);
output.write(ModelControllerProtocol.PARAM_INPUTSTREAMS_LENGTH);
output.writeInt(inputStreamLength);
}
@Override
public void handleRequest(final DataInput input, final ActiveOperation.ResultHandler<ModelNode> resultHandler, final ManagementRequestContext<OperationExecutionContext> context) throws IOException {
expectHeader(input, ModelControllerProtocol.PARAM_RESPONSE);
final ModelNode node = new ModelNode();
node.readExternal(input);
resultHandler.done(node);
expectHeader(input, ManagementProtocol.RESPONSE_END);
}
}, executionContext);
}
private static class ReadAttachmentInputStreamRequestHandler implements ManagementRequestHandler<ModelNode, OperationExecutionContext> {
@Override
public void handleRequest(final DataInput input, final ActiveOperation.ResultHandler<ModelNode> resultHandler,
final ManagementRequestContext<OperationExecutionContext> context) throws IOException {
// Read the inputStream index
expectHeader(input, ModelControllerProtocol.PARAM_INPUTSTREAM_INDEX);
final int index = input.readInt();
context.executeAsync(new ManagementRequestContext.AsyncTask<OperationExecutionContext>() {
@Override
public void execute(final ManagementRequestContext<OperationExecutionContext> context) throws Exception {
final OperationExecutionContext exec = context.getAttachment();
final ManagementRequestHeader header = ManagementRequestHeader.class.cast(context.getRequestHeader());
final ManagementResponseHeader response = new ManagementResponseHeader(header.getVersion(), header.getRequestId(), null);
final InputStreamEntry entry = exec.getStream(index);
synchronized (entry) {
// Initialize the stream entry
final int size = entry.initialize();
try {
final FlushableDataOutput output = context.writeMessage(response);
try {
output.writeByte(ModelControllerProtocol.PARAM_INPUTSTREAM_LENGTH);
output.writeInt(size);
output.writeByte(ModelControllerProtocol.PARAM_INPUTSTREAM_CONTENTS);
entry.copyStream(output);
output.writeByte(ManagementProtocol.RESPONSE_END);
output.close();
} finally {
StreamUtils.safeClose(output);
}
} finally {
// the caller is responsible for closing the input streams
// StreamUtils.safeClose(is);
}
}
}
});
}
}
private static class HandleReportRequestHandler implements ManagementRequestHandler<ModelNode, OperationExecutionContext> {
@Override
public void handleRequest(final DataInput input, final ActiveOperation.ResultHandler<ModelNode> resultHandler, final ManagementRequestContext<OperationExecutionContext> context) throws IOException {
expectHeader(input, ModelControllerProtocol.PARAM_MESSAGE_SEVERITY);
final MessageSeverity severity = Enum.valueOf(MessageSeverity.class, input.readUTF());
expectHeader(input, ModelControllerProtocol.PARAM_MESSAGE);
final String message = input.readUTF();
expectHeader(input, ManagementProtocol.REQUEST_END);
final OperationExecutionContext requestContext = context.getAttachment();
// perhaps execute async
final OperationMessageHandler handler = requestContext.getOperationMessageHandler();
handler.handleReport(severity, message);
}
}
protected AsyncFuture<ModelNode> executeRequest(final ManagementRequest<ModelNode, OperationExecutionContext> request, final OperationExecutionContext attachment) throws IOException {
final ActiveOperation<ModelNode, OperationExecutionContext> support = getChannelAssociation().executeRequest(request, attachment);
return new DelegatingCancellableAsyncFuture(support.getResult(), support.getOperationId());
}
static class OperationExecutionContext implements ActiveOperation.CompletedCallback<ModelNode> {
private final Operation operation;
private final OperationMessageHandler handler;
private final List<InputStreamEntry> streams;
OperationExecutionContext(final Operation operation, final OperationMessageHandler handler) {
this.operation = operation;
this.handler = handler != null ? handler : NO_OP_HANDLER;
this.streams = createStreamEntries(operation);
}
OperationMessageHandler getOperationMessageHandler() {
return handler;
}
InputStreamEntry getStream(int index) {
final InputStreamEntry entry = streams.get(index);
if(entry == null) {
// Hmm, a null input-stream should be a failure?
return InputStreamEntry.EMPTY;
}
return entry;
}
@Override
public void completed(ModelNode result) {
closeAttachments();
}
@Override
public void failed(Exception e) {
closeAttachments();
}
@Override
public void cancelled() {
closeAttachments();
}
private void closeAttachments() {
for(final InputStreamEntry entry : streams) {
StreamUtils.safeClose(entry);
}
if(operation.isAutoCloseStreams()) {
StreamUtils.safeClose(operation);
}
}
static OperationExecutionContext create(final ModelNode operation) {
return create(new OperationBuilder(operation).build(), NO_OP_HANDLER);
}
static OperationExecutionContext create(final Operation operation) {
return create(operation, NO_OP_HANDLER);
}
static OperationExecutionContext create(final ModelNode operation, final OperationMessageHandler handler) {
return create(new OperationBuilder(operation).build(), handler);
}
static OperationExecutionContext create(final Operation operation, final OperationMessageHandler handler) {
return new OperationExecutionContext(operation, handler);
}
}
/**
* Wraps the request execution AsyncFuture in an AsyncFuture impl that handles cancellation by sending a cancellation
* request to the remote side.
*/
private class DelegatingCancellableAsyncFuture extends AbstractDelegatingAsyncFuture<ModelNode> {
private final int batchId;
private DelegatingCancellableAsyncFuture(final AsyncFuture<ModelNode> delegate, final int batchId) {
super(delegate);
this.batchId = batchId;
}
@Override
public void asyncCancel(boolean interruptionDesired) {
try {
getChannelAssociation().executeRequest(batchId, new CancelAsyncRequest());
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
/**
* Request cancelling the remote operation.
*/
private static class CancelAsyncRequest extends AbstractManagementRequest<ModelNode, OperationExecutionContext> {
@Override
public byte getOperationType() {
return ModelControllerProtocol.CANCEL_ASYNC_REQUEST;
}
@Override
protected void sendRequest(ActiveOperation.ResultHandler<ModelNode> resultHandler, ManagementRequestContext<OperationExecutionContext> context, FlushableDataOutput output) throws IOException {
//
}
@Override
public void handleRequest(DataInput input, ActiveOperation.ResultHandler<ModelNode> resultHandler, ManagementRequestContext<OperationExecutionContext> context) throws IOException {
// Once the remote operation returns, we can set the cancelled status
resultHandler.cancel();
}
}
static List<InputStreamEntry> createStreamEntries(final Operation operation) {
final List<InputStream> streams = operation.getInputStreams();
if(streams.isEmpty()) {
return Collections.emptyList();
}
final List<InputStreamEntry> entries = new ArrayList<InputStreamEntry>();
final boolean autoClose = operation.isAutoCloseStreams();
for(final InputStream stream : streams) {
if(stream instanceof InputStreamEntry) {
entries.add((InputStreamEntry) stream);
} else {
// TODO don't copy everything to memory... perhaps use InputStreamEntry.CachingStreamEntry
entries.add(new InputStreamEntry.InMemoryEntry(stream, autoClose));
}
}
return entries;
}
}