/**
* 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.api.repl.commands;
import org.apache.hive.hcatalog.api.repl.Command;
import org.apache.hive.hcatalog.data.ReaderWriter;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
public class DropDatabaseCommand implements Command {
private String dbName = null;
private long eventId;
public DropDatabaseCommand(String dbName, long eventId) {
this.dbName = dbName;
this.eventId = eventId;
}
/**
* Trivial ctor to support Writable reflections instantiation
* do not expect to use this object as-is, unless you call
* readFields after using this ctor
*/
public DropDatabaseCommand(){
}
@Override
public List<String> get() {
// DROP (DATABASE|SCHEMA) [IF EXISTS] database_name [RESTRICT|CASCADE];
StringBuilder sb = new StringBuilder();
sb.append("DROP DATABASE IF EXISTS ");
sb.append(dbName);
sb.append(" CASCADE");
return Collections.singletonList(sb.toString());
}
@Override
public boolean isRetriable() {
return true;
}
@Override
public boolean isUndoable() {
return false;
}
@Override
public List<String> getUndo() {
throw new UnsupportedOperationException("getUndo called on command that returned false for isUndoable");
}
@Override
public List<String> cleanupLocationsPerRetry() {
return Collections.emptyList();
}
@Override
public List<String> cleanupLocationsAfterEvent() {
return Collections.emptyList();
}
@Override
public long getEventId() {
return eventId;
}
@Override
public void write(DataOutput dataOutput) throws IOException {
ReaderWriter.writeDatum(dataOutput, dbName);
ReaderWriter.writeDatum(dataOutput, eventId);
}
@Override
public void readFields(DataInput dataInput) throws IOException {
dbName = (String)ReaderWriter.readDatum(dataInput);
eventId = (Long) ReaderWriter.readDatum(dataInput);
}
}