Java tutorial
/** * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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.myriad.configuration; import com.fasterxml.jackson.annotation.JsonProperty; import com.google.common.base.Optional; import org.apache.myriad.configuration.OptionalSerializer.OptionalSerializerDouble; import org.apache.myriad.configuration.OptionalSerializer.OptionalSerializerString; import org.codehaus.jackson.map.annotate.JsonSerialize; import org.hibernate.validator.constraints.NotEmpty; /** * Configuration for the Executor */ public class MyriadExecutorConfiguration { /** * Translates to -Xmx for the NodeManager JVM. */ @JsonProperty @JsonSerialize(using = OptionalSerializerDouble.class) private Double jvmMaxMemoryMB; @JsonProperty @NotEmpty private String path; @JsonProperty @JsonSerialize(using = OptionalSerializerString.class) private String nodeManagerUri; public Optional<Double> getJvmMaxMemoryMB() { return Optional.fromNullable(jvmMaxMemoryMB); } public String getPath() { return path; } public Optional<String> getNodeManagerUri() { return Optional.fromNullable(nodeManagerUri); } }