| /* |
| * Copyright (c) 2014 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * 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.datatorrent.contrib.hbase; |
| |
| import java.io.IOException; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.client.HTable; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| import com.datatorrent.lib.db.Connectable; |
| /** |
| * A {@link Connectable} that uses HBase to connect to stores and implements Connectable interface. |
| * <p> |
| * @displayName HBase Store |
| * @category Store |
| * @tags store |
| * @since 1.0.2 |
| */ |
| public class HBaseStore implements Connectable { |
| |
| public static final String USER_NAME_SPECIFIER = "%USER_NAME%"; |
| |
| private static final Logger logger = LoggerFactory.getLogger(HBaseStore.class); |
| |
| private String zookeeperQuorum; |
| private int zookeeperClientPort; |
| protected String tableName; |
| |
| protected String principal; |
| protected String keytabPath; |
| // Default interval 30 min |
| protected long reloginCheckInterval = 30 * 60 * 1000; |
| protected transient Thread loginRenewer; |
| private volatile transient boolean doRelogin; |
| |
| protected transient HTable table; |
| |
| /** |
| * Get the zookeeper quorum location. |
| * |
| * @return The zookeeper quorum location |
| */ |
| public String getZookeeperQuorum() { |
| return zookeeperQuorum; |
| } |
| |
| /** |
| * Set the zookeeper quorum location. |
| * |
| * @param zookeeperQuorum |
| * The zookeeper quorum location |
| */ |
| public void setZookeeperQuorum(String zookeeperQuorum) { |
| this.zookeeperQuorum = zookeeperQuorum; |
| } |
| |
| /** |
| * Get the zookeeper client port. |
| * |
| * @return The zookeeper client port |
| */ |
| public int getZookeeperClientPort() { |
| return zookeeperClientPort; |
| } |
| |
| /** |
| * Set the zookeeper client port. |
| * |
| * @param zookeeperClientPort |
| * The zookeeper client port |
| */ |
| public void setZookeeperClientPort(int zookeeperClientPort) { |
| this.zookeeperClientPort = zookeeperClientPort; |
| } |
| |
| /** |
| * Get the HBase table name. |
| * |
| * @return The HBase table name |
| */ |
| public String getTableName() { |
| return tableName; |
| } |
| |
| /** |
| * Set the HBase table name. |
| * |
| * @param tableName |
| * The HBase table name |
| */ |
| public void setTableName(String tableName) { |
| this.tableName = tableName; |
| } |
| |
| /** |
| * Get the Kerberos principal. |
| * |
| * @return The Kerberos principal |
| */ |
| public String getPrincipal() |
| { |
| return principal; |
| } |
| |
| /** |
| * Set the Kerberos principal. |
| * |
| * @param principal |
| * The Kerberos principal |
| */ |
| public void setPrincipal(String principal) |
| { |
| this.principal = principal; |
| } |
| |
| /** |
| * Get the Kerberos keytab path |
| * |
| * @return The Kerberos keytab path |
| */ |
| public String getKeytabPath() |
| { |
| return keytabPath; |
| } |
| |
| /** |
| * Set the Kerberos keytab path. |
| * |
| * @param keytabPath |
| * The Kerberos keytab path |
| */ |
| public void setKeytabPath(String keytabPath) |
| { |
| this.keytabPath = keytabPath; |
| } |
| |
| /** |
| * Get the interval to check for relogin. |
| * |
| * @return The interval to check for relogin |
| */ |
| public long getReloginCheckInterval() |
| { |
| return reloginCheckInterval; |
| } |
| |
| /** |
| * Set the interval to check for relogin. |
| * |
| * @param reloginCheckInterval |
| * The interval to check for relogin |
| */ |
| public void setReloginCheckInterval(long reloginCheckInterval) |
| { |
| this.reloginCheckInterval = reloginCheckInterval; |
| } |
| |
| /** |
| * Get the HBase table . |
| * |
| * @return The HBase table |
| */ |
| public HTable getTable() { |
| return table; |
| } |
| |
| /** |
| * Set the HBase table. |
| * |
| * @param table |
| * The HBase table |
| */ |
| public void setTable(HTable table) { |
| this.table = table; |
| } |
| |
| /** |
| * Get the configuration. |
| * |
| * @return The configuration |
| */ |
| public Configuration getConfiguration() { |
| return configuration; |
| } |
| |
| /** |
| * Set the configuration. |
| * |
| * @param configuration |
| * The configuration |
| */ |
| public void setConfiguration(Configuration configuration) { |
| this.configuration = configuration; |
| } |
| |
| protected transient Configuration configuration; |
| |
| @Override |
| public void connect() throws IOException { |
| if ((principal != null) && (keytabPath != null)) { |
| String lprincipal = evaluateProperty(principal); |
| String lkeytabPath = evaluateProperty(keytabPath); |
| UserGroupInformation.loginUserFromKeytab(lprincipal, lkeytabPath); |
| doRelogin = true; |
| loginRenewer = new Thread(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| logger.debug("Renewer starting"); |
| try { |
| while (doRelogin) { |
| Thread.sleep(reloginCheckInterval); |
| try { |
| UserGroupInformation.getLoginUser().checkTGTAndReloginFromKeytab(); |
| } catch (IOException e) { |
| logger.error("Error trying to relogin from keytab", e); |
| } |
| } |
| } catch (InterruptedException e) { |
| if (doRelogin) { |
| logger.warn("Renewer interrupted... stopping"); |
| } |
| } |
| logger.debug("Renewer ending"); |
| } |
| }); |
| loginRenewer.start(); |
| } |
| configuration = HBaseConfiguration.create(); |
| // The default configuration is loaded from resources in classpath, the following parameters can be optionally set |
| // to override defaults |
| if (zookeeperQuorum != null) { |
| configuration.set("hbase.zookeeper.quorum", zookeeperQuorum); |
| } |
| if (zookeeperClientPort != 0) { |
| configuration.set("hbase.zookeeper.property.clientPort", "" + zookeeperClientPort); |
| } |
| table = new HTable(configuration, tableName); |
| table.setAutoFlushTo(false); |
| |
| } |
| |
| private String evaluateProperty(String property) throws IOException |
| { |
| if (property.contains(USER_NAME_SPECIFIER)) { |
| property = property.replaceAll(USER_NAME_SPECIFIER, UserGroupInformation.getLoginUser().getShortUserName()); |
| } |
| return property; |
| } |
| |
| @Override |
| public void disconnect() throws IOException { |
| if (loginRenewer != null) { |
| doRelogin = false; |
| loginRenewer.interrupt(); |
| try { |
| loginRenewer.join(); |
| } catch (InterruptedException e) { |
| logger.warn("Unsuccessful waiting for renewer to finish. Proceeding to shutdown", e); |
| } |
| } |
| } |
| |
| @Override |
| public boolean isConnected() { |
| // not applicable to hbase |
| return false; |
| } |
| |
| } |