/*
* 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.geode.redis.internal.executor.string;
import java.util.List;
import org.apache.geode.cache.Region;
import org.apache.geode.redis.internal.ByteArrayWrapper;
import org.apache.geode.redis.internal.Command;
import org.apache.geode.redis.internal.Coder;
import org.apache.geode.redis.internal.ExecutionHandlerContext;
import org.apache.geode.redis.internal.RedisConstants.ArityDef;
import org.apache.geode.redis.internal.executor.AbstractExecutor;
public class SetExecutor extends StringExecutor {
private final String SUCCESS = "OK";
private final int VALUE_INDEX = 2;
@Override
public void executeCommand(Command command, ExecutionHandlerContext context) {
List<byte[]> commandElems = command.getProcessedCommand();
Region<ByteArrayWrapper, ByteArrayWrapper> r = context.getRegionProvider().getStringsRegion();
if (commandElems.size() < 3) {
command.setResponse(Coder.getErrorResponse(context.getByteBufAllocator(), ArityDef.SET));
return;
}
ByteArrayWrapper key = command.getKey();
checkDataType(key, context);
byte[] value = commandElems.get(VALUE_INDEX);
ByteArrayWrapper valueWrapper = new ByteArrayWrapper(value);
boolean NX = false; // Set only if not exists
boolean XX = false; // Set only if exists
long expiration = 0L;
if (commandElems.size() >= 6) {
String elem4;
String elem5;
String elem6;
elem4 = Coder.bytesToString(commandElems.get(3));
elem5 = Coder.bytesToString(commandElems.get(4));
elem6 = Coder.bytesToString(commandElems.get(5));
if (elem4.equalsIgnoreCase("XX") || elem6.equalsIgnoreCase("XX"))
XX = true;
else if (elem4.equalsIgnoreCase("NX") || elem6.equalsIgnoreCase("NX"))
NX = true;
if (elem4.equalsIgnoreCase("PX"))
expiration = getExpirationMillis(elem4, elem5);
else if (elem5.equalsIgnoreCase("PX"))
expiration = getExpirationMillis(elem5, elem6);
else if (elem4.equalsIgnoreCase("EX"))
expiration = getExpirationMillis(elem4, elem5);
else if (elem5.equalsIgnoreCase("EX"))
expiration = getExpirationMillis(elem5, elem6);
} else if (commandElems.size() >= 5) {
String elem4;
String expiry;
elem4 = Coder.bytesToString(commandElems.get(3));
expiry = Coder.bytesToString(commandElems.get(4));
expiration = getExpirationMillis(elem4, expiry);
} else if (commandElems.size() >= 4) {
byte[] elem4 = commandElems.get(3);
if (elem4.length == 2 && Character.toUpperCase(elem4[1]) == 'X') {
if (Character.toUpperCase(elem4[0]) == 'N')
NX = true;
else if (Character.toUpperCase(elem4[0]) == 'X')
XX = true;
}
}
boolean keyWasSet = false;
if (NX)
keyWasSet = setNX(r, command, key, valueWrapper, context);
else if (XX)
keyWasSet = setXX(r, command, key, valueWrapper, context);
else {
checkAndSetDataType(key, context);
r.put(key, valueWrapper);
command.setResponse(Coder.getSimpleStringResponse(context.getByteBufAllocator(), SUCCESS));
keyWasSet = true;
}
if (keyWasSet && expiration > 0L) {
context.getRegionProvider().setExpiration(key, expiration);
}
}
private boolean setNX(Region<ByteArrayWrapper, ByteArrayWrapper> r, Command command,
ByteArrayWrapper key, ByteArrayWrapper valueWrapper, ExecutionHandlerContext context) {
checkAndSetDataType(key, context);
Object oldValue = r.putIfAbsent(key, valueWrapper);
if (oldValue != null) {
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
return false;
} else {
command.setResponse(Coder.getSimpleStringResponse(context.getByteBufAllocator(), SUCCESS));
return true;
}
}
private boolean setXX(Region<ByteArrayWrapper, ByteArrayWrapper> r, Command command,
ByteArrayWrapper key, ByteArrayWrapper valueWrapper, ExecutionHandlerContext context) {
if (r.containsKey(key)) {
checkAndSetDataType(key, context);
r.put(key, valueWrapper);
command.setResponse(Coder.getSimpleStringResponse(context.getByteBufAllocator(), SUCCESS));
return true;
} else {
command.setResponse(Coder.getNilResponse(context.getByteBufAllocator()));
return false;
}
}
private long getExpirationMillis(String expx, String expirationString) {
long expiration = 0L;
try {
expiration = Long.parseLong(expirationString);
} catch (NumberFormatException e) {
return 0L;
}
if (expx.equalsIgnoreCase("EX"))
return expiration * AbstractExecutor.millisInSecond;
else if (expx.equalsIgnoreCase("PX"))
return expiration;
else
return 0L;
}
}