/**
* 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.hive.hcatalog.messaging.json;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import org.apache.hadoop.hive.metastore.api.Index;
import org.apache.hive.hcatalog.messaging.AlterIndexMessage;
import org.apache.hive.hcatalog.messaging.CreateFunctionMessage;
import org.apache.hive.hcatalog.messaging.CreateIndexMessage;
import org.apache.hive.hcatalog.messaging.DropFunctionMessage;
import org.apache.hive.hcatalog.messaging.DropIndexMessage;
import org.apache.hadoop.hive.metastore.api.Database;
import org.apache.hadoop.hive.metastore.api.Function;
import org.apache.hadoop.hive.metastore.api.Partition;
import org.apache.hadoop.hive.metastore.api.Table;
import org.apache.hive.hcatalog.messaging.AddPartitionMessage;
import org.apache.hive.hcatalog.messaging.AlterPartitionMessage;
import org.apache.hive.hcatalog.messaging.AlterTableMessage;
import org.apache.hive.hcatalog.messaging.CreateDatabaseMessage;
import org.apache.hive.hcatalog.messaging.CreateTableMessage;
import org.apache.hive.hcatalog.messaging.DropDatabaseMessage;
import org.apache.hive.hcatalog.messaging.DropPartitionMessage;
import org.apache.hive.hcatalog.messaging.DropTableMessage;
import org.apache.hive.hcatalog.messaging.InsertMessage;
import org.apache.hive.hcatalog.messaging.MessageDeserializer;
import org.apache.hive.hcatalog.messaging.MessageFactory;
import org.apache.thrift.TException;
import org.apache.thrift.TSerializer;
import org.apache.thrift.protocol.TJSONProtocol;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* The JSON implementation of the MessageFactory. Constructs JSON implementations of
* each message-type.
*/
public class JSONMessageFactory extends MessageFactory {
private static final Logger LOG = LoggerFactory.getLogger(JSONMessageFactory.class.getName());
private static JSONMessageDeserializer deserializer = new JSONMessageDeserializer();
@Override
public MessageDeserializer getDeserializer() {
return deserializer;
}
@Override
public String getVersion() {
return "0.1";
}
@Override
public String getMessageFormat() {
return "json";
}
@Override
public CreateDatabaseMessage buildCreateDatabaseMessage(Database db) {
return new JSONCreateDatabaseMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, db.getName(),
now());
}
@Override
public DropDatabaseMessage buildDropDatabaseMessage(Database db) {
return new JSONDropDatabaseMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, db.getName(),
now());
}
@Override
public CreateTableMessage buildCreateTableMessage(Table table) {
return new JSONCreateTableMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, table.getDbName(),
table.getTableName(), now());
}
@Override
public AlterTableMessage buildAlterTableMessage(Table before, Table after) {
return new JSONAlterTableMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, before.getDbName(),
before.getTableName(), now());
}
@Override
public DropTableMessage buildDropTableMessage(Table table) {
return new JSONDropTableMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, table.getDbName(), table.getTableName(),
now());
}
@Override
public AddPartitionMessage buildAddPartitionMessage(Table table, Iterator<Partition> partitionsIterator) {
return new JSONAddPartitionMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, table.getDbName(),
table.getTableName(), getPartitionKeyValues(table, partitionsIterator), now());
}
@Override
public AlterPartitionMessage buildAlterPartitionMessage(Table table, Partition before, Partition after) {
return new JSONAlterPartitionMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL,
before.getDbName(), before.getTableName(), getPartitionKeyValues(table,before),now());
}
@Override
public DropPartitionMessage buildDropPartitionMessage(Table table, Iterator<Partition> partitions) {
return new JSONDropPartitionMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, table.getDbName(),
table.getTableName(), getPartitionKeyValues(table, partitions), now());
}
@Override
public CreateFunctionMessage buildCreateFunctionMessage(Function fn) {
return new JSONCreateFunctionMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, fn,
now());
}
@Override
public DropFunctionMessage buildDropFunctionMessage(Function fn) {
return new JSONDropFunctionMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, fn,
now());
}
@Override
public CreateIndexMessage buildCreateIndexMessage(Index idx) {
return new JSONCreateIndexMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, idx,
now());
}
@Override
public DropIndexMessage buildDropIndexMessage(Index idx) {
return new JSONDropIndexMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, idx,
now());
}
@Override
public AlterIndexMessage buildAlterIndexMessage(Index before, Index after) {
return new JSONAlterIndexMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, before, after,
now());
}
@Override
public InsertMessage buildInsertMessage(String db, String table, Map<String,String> partKeyVals,
List<String> files) {
return new JSONInsertMessage(HCAT_SERVER_URL, HCAT_SERVICE_PRINCIPAL, db, table, partKeyVals,
files, now());
}
private long now() {
return System.currentTimeMillis() / 1000;
}
private static Map<String, String> getPartitionKeyValues(Table table, Partition partition) {
Map<String, String> partitionKeys = new LinkedHashMap<String, String>();
for (int i=0; i<table.getPartitionKeysSize(); ++i)
partitionKeys.put(table.getPartitionKeys().get(i).getName(),
partition.getValues().get(i));
return partitionKeys;
}
private static List<Map<String, String>> getPartitionKeyValues(final Table table, Iterator<Partition> iterator) {
return Lists.newArrayList(Iterators.transform(iterator, new com.google.common.base.Function<Partition, Map<String, String>>() {
@Override
public Map<String, String> apply(@Nullable Partition partition) {
return getPartitionKeyValues(table, partition);
}
}));
}
static String createFunctionObjJson(Function functionObj) throws TException {
TSerializer serializer = new TSerializer(new TJSONProtocol.Factory());
return serializer.toString(functionObj, "UTF-8");
}
static String createIndexObjJson(Index indexObj) throws TException {
TSerializer serializer = new TSerializer(new TJSONProtocol.Factory());
return serializer.toString(indexObj, "UTF-8");
}
}