/**
*
* geo-platform
* Rich webgis framework
* http://geo-platform.org
* ====================================================================
*
* Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version. This program is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License
* for more details. You should have received a copy of the GNU General
* Public License along with this program. If not, see http://www.gnu.org/licenses/
*
* ====================================================================
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole combination.
*
* As a special exception, the copyright holders of this library give you permission
* to link this library with independent modules to produce an executable, regardless
* of the license terms of these independent modules, and to copy and distribute
* the resulting executable under terms of your choice, provided that you also meet,
* for each linked independent module, the terms and conditions of the license of
* that module. An independent module is a module which is not derived from or
* based on this library. If you modify this library, you may extend this exception
* to your version of the library, but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version.
*/
package org.geosdi.geoplatform.experimental.el.search.delete.responsibility;
import com.google.common.base.Preconditions;
import org.elasticsearch.action.bulk.BulkRequestBuilder;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.rest.RestStatus;
import org.geosdi.geoplatform.experimental.el.dao.ElasticSearchDAO;
import org.geosdi.geoplatform.experimental.el.search.delete.DeleteByPage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Arrays;
import java.util.concurrent.Callable;
import static org.geosdi.geoplatform.experimental.el.search.delete.responsibility.AbstractParallelDeleteHandler.PAGE_SIZE_LIMIT;
/**
* @author Giuseppe La Scaleia - CNR IMAA geoSDI Group
* @email giuseppe.lascaleia@geosdi.org
*/
class GPElasticSearchDeleteTask implements Callable<BulkResponse> {
private static final Logger logger = LoggerFactory.getLogger(GPElasticSearchDeleteTask.class);
//
private final ElasticSearchDAO searchDAO;
private final DeleteByPage page;
private final int start;
private final int taskNumber;
public GPElasticSearchDeleteTask(ElasticSearchDAO theSearchDAO, DeleteByPage thePage,
int taskNumber) {
Preconditions.checkNotNull(theSearchDAO, "Parameter SearchDAO must not be null.");
Preconditions.checkNotNull(thePage, "Parameter Page must not be null.");
this.searchDAO = theSearchDAO;
this.page = thePage;
this.taskNumber = taskNumber;
this.start = (this.page.getFrom() + (this.taskNumber * PAGE_SIZE_LIMIT));
}
/**
* Computes a result, or throws an exception if unable to do so.
*
* @return computed result
* @throws Exception if unable to compute a result
*/
@Override
public BulkResponse call() throws Exception {
logger.debug("########################Execution of {}\n", this);
SearchRequestBuilder builder = page.buildPage(searchDAO.client()
.prepareSearch(searchDAO.getIndexName()).setTypes(searchDAO.getIndexType()))
.setFrom(this.start).setSize(PAGE_SIZE_LIMIT).setNoFields();
logger.trace("#########################{} ----------> call#Builder : \n{}\n",
this, builder.toString());
SearchResponse searchResponse = builder.execute().actionGet();
if (searchResponse.status() != RestStatus.OK) {
throw new IllegalStateException("Problem in Search : " + searchResponse.status());
}
BulkRequestBuilder bulkRequest = searchDAO.client().prepareBulk();
Arrays.stream(searchResponse.getHits().hits())
.map(searchHit -> new DeleteRequest(searchDAO.getIndexName(), searchDAO.getIndexType(),
searchHit.getId()))
.filter(deleteRequest -> deleteRequest != null)
.forEach(deleteRequest -> bulkRequest.add(deleteRequest));
BulkResponse bulkResponse = bulkRequest.get();
if (bulkResponse.hasFailures()) {
throw new IllegalStateException(bulkResponse.buildFailureMessage());
}
return bulkResponse;
}
@Override
public String toString() {
return getClass().getSimpleName() + "{"
+ " #taskNumber : " + this.taskNumber
+ ", @start : " + this.start
+ "}";
}
}