com.meltmedia.dropwizard.etcd.cluster.ClusterProcessorIT.java Source code

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Here is the source code for com.meltmedia.dropwizard.etcd.cluster.ClusterProcessorIT.java

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/**
 * Copyright (C) 2015 meltmedia (christian.trimble@meltmedia.com)
 *
 * Licensed 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 com.meltmedia.dropwizard.etcd.cluster;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.timeout;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.JsonNodeFactory;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.meltmedia.dropwizard.etcd.cluster.ClusterProcessLifecycle;
import com.meltmedia.dropwizard.etcd.cluster.ClusterProcessor;
import com.meltmedia.dropwizard.etcd.json.EtcdDirectoryDao;
import com.meltmedia.dropwizard.etcd.junit.EtcdClientRule;
import com.meltmedia.dropwizard.etcd.junit.EtcdJsonRule;

public class ClusterProcessorIT {
    @ClassRule
    public static EtcdClientRule etcdClientSupplier = new EtcdClientRule("http://127.0.0.1:2379");

    @Rule
    public EtcdJsonRule factoryRule = new EtcdJsonRule(etcdClientSupplier::getClient, "/test");

    ClusterProcessor<NodeData> service;
    ScheduledExecutorService executor;
    EtcdDirectoryDao<ClusterProcess> dao;
    ClusterProcessLifecycle lifecycle;

    @Before
    public void setUp() throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        executor = Executors.newScheduledThreadPool(4, Executors.defaultThreadFactory());
        lifecycle = mock(ClusterProcessLifecycle.class);

        service = ClusterProcessor.<NodeData>builder().withMapper(mapper)
                .withDirectory(factoryRule.getFactory().newDirectory("/jobs", new TypeReference<ClusterProcess>() {
                })).withLifecycleFactory(d -> lifecycle).withNodeId("1").withType(new TypeReference<NodeData>() {
                }).build();

        dao = new EtcdDirectoryDao<ClusterProcess>(etcdClientSupplier::getClient, "/test/jobs", mapper,
                new TypeReference<ClusterProcess>() {
                });

        service.start();
    }

    @After
    public void tearDown() throws Exception {
        service.stop();
    }

    @Test
    public void shouldRunProcessLifecycle() {
        dao.put("id", processNode("1", "name"));

        verify(lifecycle, timeout(1000).times(1)).start();

        dao.remove("id");

        verify(lifecycle, timeout(1000).times(1)).stop();
    }

    @Test
    public void shouldStopWhenProcessReassignedToAnotherNode() {
        dao.put("id", processNode("1", "name"));

        verify(lifecycle, timeout(1000).times(1)).start();

        dao.put("id", processNode("2", "name"));

        verify(lifecycle, timeout(1000).times(1)).stop();
    }

    @Test
    public void shouldStartWhenReassignedToThisNode() {
        dao.put("id", processNode("2", "name"));

        verify(lifecycle, never()).start();

        dao.put("id", processNode("1", "name"));

        verify(lifecycle, timeout(1000).times(1)).start();
    }

    @Test
    public void shouldStopProcessesWhenServiceStops() {
        dao.put("id", processNode("1", "name"));

        verify(lifecycle, timeout(1000).times(1)).start();

        service.stop();

        verify(lifecycle, timeout(1000).times(1)).stop();
    }

    public static ClusterProcess processNode(String assignedTo, String name) {
        return new ClusterProcess().withAssignedTo(assignedTo).withConfiguration(nodeData(name));
    }

    public static ObjectNode nodeData(String name) {
        return JsonNodeFactory.instance.objectNode().put("name", name);
    }

    public static class NodeData {
        protected String name;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public NodeData withName(String name) {
            this.name = name;
            return this;
        }

        public String toString() {
            return ToStringBuilder.reflectionToString(this);
        }

        public boolean equals(Object o) {
            return EqualsBuilder.reflectionEquals(this, o);
        }
    }

}