/*
* 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.ignite.internal.processors.rest.handlers.datastructures;
import java.util.Collection;
import java.util.concurrent.Callable;
import org.apache.ignite.IgniteAtomicLong;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.GridKernalContext;
import org.apache.ignite.internal.IgniteInternalFuture;
import org.apache.ignite.internal.processors.rest.GridRestCommand;
import org.apache.ignite.internal.processors.rest.GridRestResponse;
import org.apache.ignite.internal.processors.rest.handlers.GridRestCommandHandlerAdapter;
import org.apache.ignite.internal.processors.rest.request.DataStructuresRequest;
import org.apache.ignite.internal.processors.rest.request.GridRestRequest;
import org.apache.ignite.internal.util.future.GridFinishedFuture;
import org.apache.ignite.internal.util.typedef.CX1;
import org.apache.ignite.internal.util.typedef.internal.U;
import static org.apache.ignite.internal.processors.rest.GridRestCommand.ATOMIC_DECREMENT;
import static org.apache.ignite.internal.processors.rest.GridRestCommand.ATOMIC_INCREMENT;
/**
*
*/
public class DataStructuresCommandHandler extends GridRestCommandHandlerAdapter {
/** Supported commands. */
private static final Collection<GridRestCommand> SUPPORTED_COMMANDS = U.sealList(
ATOMIC_INCREMENT,
ATOMIC_DECREMENT
);
/**
* @param ctx Context.
*/
public DataStructuresCommandHandler(GridKernalContext ctx) {
super(ctx);
}
/** {@inheritDoc} */
@Override public Collection<GridRestCommand> supportedCommands() {
return SUPPORTED_COMMANDS;
}
/** {@inheritDoc} */
@Override public IgniteInternalFuture<GridRestResponse> handleAsync(GridRestRequest req) {
assert SUPPORTED_COMMANDS.contains(req.command()) : req.command();
return incrementOrDecrement((DataStructuresRequest)req).chain(
new CX1<IgniteInternalFuture<?>, GridRestResponse>() {
@Override public GridRestResponse applyx(IgniteInternalFuture<?> fut) throws IgniteCheckedException {
GridRestResponse res = new GridRestResponse();
res.setResponse(fut.get());
return res;
}
}
);
}
/**
* Handles increment and decrement commands.
*
* @param req Request.
* @return Future of operation result.
*/
private IgniteInternalFuture<?> incrementOrDecrement(final DataStructuresRequest req) {
assert req != null;
assert req.command() == ATOMIC_INCREMENT || req.command() == ATOMIC_DECREMENT : req.command();
if (req.key() == null) {
IgniteCheckedException err =
new IgniteCheckedException(GridRestCommandHandlerAdapter.missingParameter("key"));
return new GridFinishedFuture(err);
}
else if (req.delta() == null) {
IgniteCheckedException err =
new IgniteCheckedException(GridRestCommandHandlerAdapter.missingParameter("delta"));
return new GridFinishedFuture(err);
}
return ctx.closure().callLocalSafe(new Callable<Object>() {
@Override public Object call() throws Exception {
Long init = req.initial();
Long delta = req.delta();
boolean decr = req.command() == ATOMIC_DECREMENT;
String key = (String)req.key();
IgniteAtomicLong l = ctx.grid().atomicLong(key, init != null ? init : 0, true);
return l.addAndGet(decr ? -delta : delta);
}
}, false);
}
}