| /* |
| * 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.kylin.storage.hbase.steps; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.kylin.common.KylinConfig; |
| import org.apache.kylin.job.exception.ExecuteException; |
| import org.apache.kylin.job.execution.AbstractExecutable; |
| import org.apache.kylin.job.execution.ExecutableContext; |
| import org.apache.kylin.job.execution.ExecuteResult; |
| import org.apache.kylin.metadata.realization.IRealizationConstants; |
| import org.apache.kylin.storage.hbase.HBaseConnection; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.Lists; |
| |
| /** |
| * Drop HBase tables that is no longer needed |
| */ |
| public class MergeGCStep extends AbstractExecutable { |
| |
| private static final String OLD_HTABLES = "oldHTables"; |
| |
| private static final Logger logger = LoggerFactory.getLogger(MergeGCStep.class); |
| |
| public MergeGCStep() { |
| super(); |
| } |
| |
| @Override |
| protected ExecuteResult doWork(ExecutableContext context) throws ExecuteException { |
| |
| try { |
| logger.info("Sleep one minute before deleting the Htables"); |
| Thread.sleep(60000); |
| } catch (InterruptedException e) { |
| logger.warn("Thread interrupted"); |
| } |
| |
| logger.info("Start doing merge gc work"); |
| |
| StringBuffer output = new StringBuffer(); |
| List<String> oldTables = getOldHTables(); |
| if (oldTables != null && oldTables.size() > 0) { |
| String metadataUrlPrefix = KylinConfig.getInstanceFromEnv().getMetadataUrlPrefix(); |
| Admin admin = null; |
| try { |
| Connection conn = HBaseConnection.get(KylinConfig.getInstanceFromEnv().getStorageUrl()); |
| admin = conn.getAdmin(); |
| |
| for (String table : oldTables) { |
| if (admin.tableExists(TableName.valueOf(table))) { |
| HTableDescriptor tableDescriptor = admin.getTableDescriptor(TableName.valueOf((table))); |
| String host = tableDescriptor.getValue(IRealizationConstants.HTableTag); |
| if (metadataUrlPrefix.equalsIgnoreCase(host)) { |
| if (admin.isTableEnabled(TableName.valueOf(table))) { |
| admin.disableTable(TableName.valueOf(table)); |
| } |
| admin.deleteTable(TableName.valueOf(table)); |
| logger.debug("Dropped htable: " + table); |
| output.append("HBase table " + table + " is dropped. \n"); |
| } else { |
| logger.debug("Skip htable: " + table); |
| output.append("Skip htable: " + table + ". \n"); |
| } |
| } |
| } |
| |
| } catch (IOException e) { |
| output.append("Got error when drop HBase table, exiting... \n"); |
| // This should not block the merge job; Orphans should be cleaned up in StorageCleanupJob |
| return new ExecuteResult(ExecuteResult.State.ERROR, output.append(e.getLocalizedMessage()).toString()); |
| } finally { |
| if (admin != null) |
| try { |
| admin.close(); |
| } catch (IOException e) { |
| logger.error(e.getLocalizedMessage()); |
| } |
| } |
| } |
| |
| return new ExecuteResult(ExecuteResult.State.SUCCEED, output.toString()); |
| } |
| |
| public void setOldHTables(List<String> ids) { |
| setParam(OLD_HTABLES, StringUtils.join(ids, ",")); |
| } |
| |
| private List<String> getOldHTables() { |
| final String ids = getParam(OLD_HTABLES); |
| if (ids != null) { |
| final String[] splitted = StringUtils.split(ids, ","); |
| ArrayList<String> result = Lists.newArrayListWithExpectedSize(splitted.length); |
| for (String id : splitted) { |
| result.add(id); |
| } |
| return result; |
| } else { |
| return Collections.emptyList(); |
| } |
| } |
| |
| } |