/*
* Copyright 2013 NGDATA nv
*
* 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.ngdata.hbaseindexer.cli;
import com.google.common.collect.Lists;
import com.ngdata.hbaseindexer.model.api.IndexerDefinition;
import com.ngdata.hbaseindexer.model.api.IndexerDefinition.LifecycleState;
import com.ngdata.hbaseindexer.model.api.IndexerDefinitionBuilder;
import com.ngdata.hbaseindexer.model.api.IndexerNotFoundException;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.apache.zookeeper.KeeperException;
public class DeleteIndexerCli extends BaseIndexCli {
private OptionSpec<String> nameOption;
public static void main(String[] args) throws Exception {
new DeleteIndexerCli().run(args);
}
@Override
protected String getCmdName() {
return "delete-indexer";
}
@Override
protected OptionParser setupOptionParser() {
OptionParser parser = super.setupOptionParser();
nameOption = parser.acceptsAll(Lists.newArrayList("n", "name"), "a name for the index").withRequiredArg().ofType(
String.class).required();
return parser;
}
private void waitForDeletion(String indexerName) throws InterruptedException, KeeperException {
System.out.printf("Deleting indexer '%s'", indexerName);
while (model.hasIndexer(indexerName)) {
IndexerDefinition indexerDef;
try {
indexerDef = model.getFreshIndexer(indexerName);
} catch (IndexerNotFoundException e) {
// The indexer was deleted between the call to hasIndexer and getIndexer, that's ok
break;
}
switch (indexerDef.getLifecycleState()) {
case DELETE_FAILED:
System.err.println("\nDelete failed");
return;
case DELETE_REQUESTED:
case DELETING:
System.out.print(".");
Thread.sleep(500);
continue;
default:
throw new IllegalStateException("Illegal lifecycle state while deleting: "
+ indexerDef.getLifecycleState());
}
}
System.out.printf("\nDeleted indexer '%s'\n", indexerName);
}
@Override
protected void run(OptionSet options) throws Exception {
super.run(options);
String indexerName = nameOption.value(options);
if (!model.hasIndexer(indexerName)) {
throw new CliException("Indexer does not exist: " + indexerName);
}
IndexerDefinition indexerDef = model.getIndexer(indexerName);
if (indexerDef.getLifecycleState() == LifecycleState.DELETE_REQUESTED
|| indexerDef.getLifecycleState() == LifecycleState.DELETING) {
System.err.printf("Delete of '%s' is already in progress\n", indexerName);
return;
}
IndexerDefinitionBuilder builder = new IndexerDefinitionBuilder();
builder.startFrom(indexerDef);
builder.lifecycleState(LifecycleState.DELETE_REQUESTED);
model.updateIndexerInternal(builder.build());
waitForDeletion(indexerName);
}
}