Github user rmetzger commented on a diff in the pull request: https://github.com/apache/flink/pull/967#discussion_r36280020 --- Diff: flink-core/src/main/java/org/apache/flink/ps/impl/ParameterServerIgniteImpl.java --- @@ -0,0 +1,105 @@ +/* + * Copyright 2015 EURA NOVA. + * + * 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.flink.ps.impl; + +import org.apache.flink.ps.model.ParameterElement; +import org.apache.flink.ps.model.ParameterServer; +import org.apache.ignite.Ignite; +import org.apache.ignite.IgniteCache; +import org.apache.ignite.Ignition; +import org.apache.ignite.cache.CacheMode; +import org.apache.ignite.configuration.CacheConfiguration; +import org.apache.ignite.configuration.IgniteConfiguration; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * An implementation of {@link org.apache.flink.ps.model.ParameterServer} using Apache Ignite + */ +public class ParameterServerIgniteImpl implements ParameterServer { + + private static final Logger log = LoggerFactory.getLogger(ParameterServerIgniteImpl.class); + + public final static String CACHE_NAME = ParameterServerIgniteImpl.class.getSimpleName(); + + public final static String GRID_NAME = "FLINK_PARAMETER_SERVER"; + + public static CacheConfiguration<String, ParameterElement> getParameterCacheConfiguration() { + CacheConfiguration<String, ParameterElement> parameterCacheCfg = new CacheConfiguration<String, ParameterElement>(); + parameterCacheCfg.setCacheMode(CacheMode.PARTITIONED); + parameterCacheCfg.setName(CACHE_NAME + "_parameter"); +// parameterCacheCfg.setAtomicityMode(CacheAtomicityMode.ATOMIC); + return parameterCacheCfg; + } + + public static CacheConfiguration<String, ParameterElement> getSharedCacheConfiguration() { + CacheConfiguration<String, ParameterElement> sharedCacheCfg = new CacheConfiguration<String, ParameterElement>(); + sharedCacheCfg.setCacheMode(CacheMode.REPLICATED); + sharedCacheCfg.setName(CACHE_NAME + "_SHARED"); + return sharedCacheCfg; + } + + private Ignite ignite = null; + private IgniteCache<String, ParameterElement> parameterCache = null; + private IgniteCache<String, ParameterElement> sharedCache = null; + + public ParameterServerIgniteImpl(String name, boolean client) { + try { + CacheConfiguration<String, ParameterElement> parameterCacheCfg = getParameterCacheConfiguration(); + CacheConfiguration<String, ParameterElement> sharedCacheCfg = + getSharedCacheConfiguration(); + + IgniteConfiguration cfg1 = new IgniteConfiguration(); + cfg1.setGridName(name); + cfg1.setPeerClassLoadingEnabled(true); + cfg1.setCacheConfiguration(parameterCacheCfg, sharedCacheCfg); + + // Beware that client mode in Ignite have a whole different meaning than what it usually means + // You still need to hav a grid instantiated to access the values, though you won't store anything + if (client) { + cfg1.setClientMode(true); + Ignition.setClientMode(true); + } + if (log.isInfoEnabled()) { + String mode = client ? "client" : "server"; + log.info("Starting parameter server " + name + " in " + mode + " mode"); + } + this.ignite = Ignition.start(cfg1); + + parameterCache = ignite.getOrCreateCache(parameterCacheCfg).withAsync(); + sharedCache = ignite.getOrCreateCache(sharedCacheCfg).withAsync(); + + log.debug("I hereby confirm that parameter cache is async enabled: " + parameterCache.isAsync()); + log.debug("I hereby confirm that shared cache is async enabled: " + sharedCache.isAsync()); + + } catch (Exception e) { + e.printStackTrace(); --- End diff -- Can you forward the exception as a runtime exception?
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