/*
* 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.redis.string;
import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.List;
import org.apache.ignite.IgniteAtomicLong;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.IgniteException;
import org.apache.ignite.IgniteLogger;
import org.apache.ignite.internal.GridKernalContext;
import org.apache.ignite.internal.processors.rest.GridRestProtocolHandler;
import org.apache.ignite.internal.processors.rest.GridRestResponse;
import org.apache.ignite.internal.processors.rest.handlers.redis.GridRedisRestCommandHandler;
import org.apache.ignite.internal.processors.rest.handlers.redis.exception.GridRedisGenericException;
import org.apache.ignite.internal.processors.rest.protocols.tcp.redis.GridRedisCommand;
import org.apache.ignite.internal.processors.rest.protocols.tcp.redis.GridRedisMessage;
import org.apache.ignite.internal.processors.rest.protocols.tcp.redis.GridRedisProtocolParser;
import org.apache.ignite.internal.processors.rest.request.GridRestCacheRequest;
import org.apache.ignite.internal.processors.rest.request.GridRestRequest;
import org.apache.ignite.internal.util.typedef.internal.U;
import static org.apache.ignite.internal.processors.rest.GridRestCommand.CACHE_PUT;
import static org.apache.ignite.internal.processors.rest.GridRestCommand.CACHE_PUT_IF_ABSENT;
import static org.apache.ignite.internal.processors.rest.GridRestCommand.CACHE_REPLACE;
import static org.apache.ignite.internal.processors.rest.protocols.tcp.redis.GridRedisCommand.SET;
/**
* Redis SET command handler.
* <p>
* No key expiration is currently supported.
*/
public class GridRedisSetCommandHandler extends GridRedisRestCommandHandler {
/** Supported commands. */
private static final Collection<GridRedisCommand> SUPPORTED_COMMANDS = U.sealList(
SET
);
/** Value position in Redis message. */
private static final int VAL_POS = 2;
/** Grid context. */
private final GridKernalContext ctx;
/**
* Handler constructor.
*
* @param log Logger to use.
* @param hnd Rest handler.
* @param ctx Context.
*/
public GridRedisSetCommandHandler(final IgniteLogger log, final GridRestProtocolHandler hnd,
GridKernalContext ctx) {
super(log, hnd);
this.ctx = ctx;
}
/** {@inheritDoc} */
@Override public Collection<GridRedisCommand> supportedCommands() {
return SUPPORTED_COMMANDS;
}
/** {@inheritDoc} */
@Override public GridRestRequest asRestRequest(GridRedisMessage msg) throws IgniteCheckedException {
assert msg != null;
if (msg.messageSize() < 3)
throw new GridRedisGenericException("Wrong number of arguments");
// check if an atomic long with the key exists (related to incr/decr).
IgniteAtomicLong l = ctx.grid().atomicLong(msg.key(), 0, false);
if (l != null) {
try {
l.close();
}
catch (IgniteException ignored) {
U.warn(log, "Failed to remove atomic long for key: " + msg.key());
}
}
GridRestCacheRequest restReq = new GridRestCacheRequest();
restReq.clientId(msg.clientId());
restReq.key(msg.key());
restReq.command(CACHE_PUT);
restReq.cacheName(CACHE_NAME);
restReq.value(msg.aux(VAL_POS));
if (msg.messageSize() >= 4) {
List<String> params = msg.aux();
// get rid of SET value.
params.remove(0);
if (U.containsStringCollection(params, "nx", true))
restReq.command(CACHE_PUT_IF_ABSENT);
else if (U.containsStringCollection(params, "xx", true))
restReq.command(CACHE_REPLACE);
setExpire(restReq, params);
}
return restReq;
}
/**
* Attempts to set expiration when EX or PX parameters are specified.
*
* @param restReq {@link GridRestCacheRequest}.
* @param params Command parameters.
* @throws GridRedisGenericException When parameters are not valid.
*/
private void setExpire(GridRestCacheRequest restReq, List<String> params) throws GridRedisGenericException {
Long px = longValue("px", params);
Long ex = longValue("ex", params);
if (px != null)
restReq.ttl(px);
else if (ex != null)
restReq.ttl(ex * 1000L);
}
/** {@inheritDoc} */
@Override public ByteBuffer makeResponse(final GridRestResponse restRes, List<String> params) {
Object resp = restRes.getResponse();
if (resp == null)
return GridRedisProtocolParser.nil();
return (!(boolean)resp ? GridRedisProtocolParser.nil() : GridRedisProtocolParser.oKString());
}
}