/*
* Copyright 2009 The Apache Software Foundation
*
* 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.hadoop.hbase.client;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.hbase.io.HbaseObjectWritable;
import org.apache.hadoop.hbase.util.Bytes;
import java.io.DataOutput;
import java.io.IOException;
import java.io.DataInput;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
/**
* Container for Actions (i.e. Get, Delete, or Put), which are grouped by
* regionName. Intended to be used with HConnectionManager.processBatch()
*/
public final class MultiAction<R> implements Writable {
// map of regions to lists of puts/gets/deletes for that region.
public Map<byte[], List<Action<R>>> actions =
new TreeMap<byte[], List<Action<R>>>(
Bytes.BYTES_COMPARATOR);
public MultiAction() {
}
/**
* Get the total number of Actions
*
* @return total number of Actions for all groups in this container.
*/
public int size() {
int size = 0;
for (List l : actions.values()) {
size += l.size();
}
return size;
}
/**
* Add an Action to this container based on it's regionName. If the regionName
* is wrong, the initial execution will fail, but will be automatically
* retried after looking up the correct region.
*
* @param regionName
* @param a
*/
public void add(byte[] regionName, Action<R> a) {
List<Action<R>> rsActions = actions.get(regionName);
if (rsActions == null) {
rsActions = new ArrayList<Action<R>>();
actions.put(regionName, rsActions);
}
rsActions.add(a);
}
public Set<byte[]> getRegions() {
return actions.keySet();
}
/**
* @return All actions from all regions in this container
*/
public List<Action<R>> allActions() {
List<Action<R>> res = new ArrayList<Action<R>>();
for (List<Action<R>> lst : actions.values()) {
res.addAll(lst);
}
return res;
}
@Override
public void write(DataOutput out) throws IOException {
out.writeInt(actions.size());
for (Map.Entry<byte[], List<Action<R>>> e : actions.entrySet()) {
Bytes.writeByteArray(out, e.getKey());
List<Action<R>> lst = e.getValue();
out.writeInt(lst.size());
for (Action a : lst) {
HbaseObjectWritable.writeObject(out, a, a.getClass(), null);
}
}
}
@Override
public void readFields(DataInput in) throws IOException {
actions.clear();
int mapSize = in.readInt();
for (int i = 0; i < mapSize; i++) {
byte[] key = Bytes.readByteArray(in);
int listSize = in.readInt();
List<Action<R>> lst = new ArrayList<Action<R>>(listSize);
for (int j = 0; j < listSize; j++) {
lst.add((Action) HbaseObjectWritable.readObject(in, null));
}
actions.put(key, lst);
}
}
}