/*
* Copyright 2012-2014 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements.
*
* Licensed 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 com.aerospike.client.command;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import com.aerospike.client.AerospikeException;
import com.aerospike.client.Key;
import com.aerospike.client.Log;
import com.aerospike.client.Record;
import com.aerospike.client.ResultCode;
import com.aerospike.client.cluster.Node;
import com.aerospike.client.policy.Policy;
public final class BatchCommandGet extends MultiCommand {
private final BatchNode.BatchNamespace batchNamespace;
private final Policy policy;
private final HashMap<Key,BatchItem> keyMap;
private final HashSet<String> binNames;
private final Record[] records;
private final int readAttr;
public BatchCommandGet(
Node node,
BatchNode.BatchNamespace batchNamespace,
Policy policy,
HashMap<Key,BatchItem> keyMap,
HashSet<String> binNames,
Record[] records,
int readAttr
) {
super(node);
this.batchNamespace = batchNamespace;
this.policy = policy;
this.keyMap = keyMap;
this.binNames = binNames;
this.records = records;
this.readAttr = readAttr;
}
@Override
protected Policy getPolicy() {
return policy;
}
@Override
protected void writeBuffer() throws AerospikeException {
setBatchGet(batchNamespace, binNames, readAttr);
}
/**
* Parse all results in the batch. Add records to shared list.
* If the record was not found, the bins will be null.
*/
protected boolean parseRecordResults(int receiveSize) throws AerospikeException, IOException {
//Parse each message response and add it to the result array
dataOffset = 0;
while (dataOffset < receiveSize) {
readBytes(MSG_REMAINING_HEADER_SIZE);
int resultCode = dataBuffer[5] & 0xFF;
// The only valid server return codes are "ok" and "not found".
// If other return codes are received, then abort the batch.
if (resultCode != 0 && resultCode != ResultCode.KEY_NOT_FOUND_ERROR) {
throw new AerospikeException(resultCode);
}
byte info3 = dataBuffer[3];
// If this is the end marker of the response, do not proceed further
if ((info3 & Command.INFO3_LAST) == Command.INFO3_LAST) {
return false;
}
int generation = Buffer.bytesToInt(dataBuffer, 6);
int expiration = Buffer.bytesToInt(dataBuffer, 10);
int fieldCount = Buffer.bytesToShort(dataBuffer, 18);
int opCount = Buffer.bytesToShort(dataBuffer, 20);
Key key = parseKey(fieldCount);
BatchItem item = keyMap.get(key);
if (item != null) {
if (resultCode == 0) {
int index = item.getIndex();
records[index] = parseRecord(opCount, generation, expiration);
}
}
else {
if (Log.debugEnabled()) {
Log.debug("Unexpected batch key returned: " + key.namespace + ',' + Buffer.bytesToHexString(key.digest));
}
}
}
return true;
}
/**
* Parses the given byte buffer and populate the result object.
* Returns the number of bytes that were parsed from the given buffer.
*/
protected Record parseRecord(int opCount, int generation, int expiration)
throws AerospikeException, IOException {
Map<String,Object> bins = null;
ArrayList<Map<String, Object>> duplicates = null;
for (int i = 0 ; i < opCount; i++) {
if (! valid) {
throw new AerospikeException.QueryTerminated();
}
readBytes(8);
int opSize = Buffer.bytesToInt(dataBuffer, 0);
byte particleType = dataBuffer[5];
byte version = dataBuffer[6];
byte nameSize = dataBuffer[7];
readBytes(nameSize);
String name = Buffer.utf8ToString(dataBuffer, 0, nameSize);
int particleBytesSize = (int) (opSize - (4 + nameSize));
readBytes(particleBytesSize);
Object value = Buffer.bytesToParticle(particleType, dataBuffer, 0, particleBytesSize);
// Currently, the batch command returns all the bins even if a subset of
// the bins are requested. We have to filter it on the client side.
// TODO: Filter batch bins on server!
if (binNames == null || binNames.contains(name)) {
Map<String,Object> vmap = null;
if (version > 0 || duplicates != null) {
if (duplicates == null) {
duplicates = new ArrayList<Map<String,Object>>(4);
duplicates.add(bins);
bins = null;
for (int j = 0; j < version; j++) {
duplicates.add(null);
}
}
else {
for (int j = duplicates.size(); j < version + 1; j++)
duplicates.add(null);
}
vmap = duplicates.get(version);
if (vmap == null) {
vmap = new HashMap<String,Object>();
duplicates.set(version, vmap);
}
}
else {
if (bins == null) {
bins = new HashMap<String,Object>();
}
vmap = bins;
}
vmap.put(name, value);
}
}
// Remove null duplicates just in case there were holes in the version number space.
if (duplicates != null) {
while (duplicates.remove(null)) {
;
}
}
return new Record(bins, duplicates, generation, expiration);
}
}