org.apache.hadoop.hive.ql.scheduled.MetastoreBasedScheduledQueryService Maven / Gradle / Ivy
/*
* 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.hadoop.hive.ql.scheduled;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.metastore.IMetaStoreClient;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.metastore.api.ScheduledQueryPollRequest;
import org.apache.hadoop.hive.metastore.api.ScheduledQueryPollResponse;
import org.apache.hadoop.hive.metastore.api.ScheduledQueryProgressInfo;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MetastoreBasedScheduledQueryService implements IScheduledQueryMaintenanceService {
private static final Logger LOG = LoggerFactory.getLogger(MetastoreBasedScheduledQueryService.class);
private HiveConf conf;
public MetastoreBasedScheduledQueryService(HiveConf conf) {
this.conf = conf;
}
@Override
public ScheduledQueryPollResponse scheduledQueryPoll() {
try {
ScheduledQueryPollRequest request = new ScheduledQueryPollRequest();
request.setClusterNamespace(getClusterNamespace());
ScheduledQueryPollResponse resp = getMSC().scheduledQueryPoll(request);
return resp;
} catch (Exception e) {
LOG.error("Exception while polling scheduled queries", e);
return null;
}
}
@Override
public void scheduledQueryProgress(ScheduledQueryProgressInfo info) {
try {
getMSC().scheduledQueryProgress(info);
} catch (Exception e) {
LOG.error("Exception while updating scheduled execution status of: " + info.getScheduledExecutionId(), e);
}
}
private IMetaStoreClient getMSC() throws MetaException, HiveException {
return Hive.get(conf).getMSC();
}
@Override
public String getClusterNamespace() {
return conf.getVar(ConfVars.HIVE_SCHEDULED_QUERIES_NAMESPACE);
}
}