| /* |
| * 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.ignite.cache.store.cassandra.session; |
| |
| import java.util.concurrent.Callable; |
| import com.datastax.driver.core.Row; |
| import com.datastax.driver.core.SimpleStatement; |
| import com.datastax.driver.core.Statement; |
| import org.apache.ignite.IgniteException; |
| import org.apache.ignite.IgniteLogger; |
| import org.apache.ignite.cache.store.cassandra.persistence.PersistenceController; |
| import org.apache.ignite.lang.IgniteBiInClosure; |
| |
| /** |
| * Worker for load cache using custom user query. |
| * |
| * @param <K> Key type. |
| * @param <V> Value type. |
| */ |
| public class LoadCacheCustomQueryWorker<K, V> implements Callable<Void> { |
| /** Cassandra session to execute CQL query */ |
| private final CassandraSession ses; |
| |
| /** Statement. */ |
| private final Statement stmt; |
| |
| /** Persistence controller */ |
| private final PersistenceController ctrl; |
| |
| /** Logger */ |
| private final IgniteLogger log; |
| |
| /** Closure for loaded values. */ |
| private final IgniteBiInClosure<K, V> clo; |
| |
| /** |
| * @param ses Session. |
| * @param qry Query. |
| * @param ctrl Control. |
| * @param log Logger. |
| * @param clo Closure for loaded values. |
| */ |
| public LoadCacheCustomQueryWorker(CassandraSession ses, String qry, PersistenceController ctrl, |
| IgniteLogger log, IgniteBiInClosure<K, V> clo) { |
| this(ses, new SimpleStatement(qry.trim().endsWith(";") ? qry : qry + ';'), ctrl, log, clo); |
| } |
| |
| /** |
| * @param ses Session. |
| * @param stmt Statement. |
| * @param ctrl Control. |
| * @param log Logger. |
| * @param clo Closure for loaded values. |
| */ |
| public LoadCacheCustomQueryWorker(CassandraSession ses, Statement stmt, PersistenceController ctrl, |
| IgniteLogger log, IgniteBiInClosure<K, V> clo) { |
| this.ses = ses; |
| this.stmt = stmt; |
| this.ctrl = ctrl; |
| this.log = log; |
| this.clo = clo; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Void call() throws Exception { |
| ses.execute(new BatchLoaderAssistant() { |
| /** {@inheritDoc} */ |
| @Override public String operationName() { |
| return "loadCache"; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Statement getStatement() { |
| return stmt; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void process(Row row) { |
| K key; |
| V val; |
| |
| try { |
| key = (K)ctrl.buildKeyObject(row); |
| } |
| catch (Throwable e) { |
| log.error("Failed to build Ignite key object from provided Cassandra row", e); |
| |
| throw new IgniteException("Failed to build Ignite key object from provided Cassandra row", e); |
| } |
| |
| try { |
| val = (V)ctrl.buildValueObject(row); |
| } |
| catch (Throwable e) { |
| log.error("Failed to build Ignite value object from provided Cassandra row", e); |
| |
| throw new IgniteException("Failed to build Ignite value object from provided Cassandra row", e); |
| } |
| |
| clo.apply(key, val); |
| } |
| }); |
| |
| return null; |
| } |
| } |