nifi-commons/nifi-site-to-site-client/src/test/java/org/apache/nifi/remote/client/socket/TestSiteToSiteClient.java

/*
 * 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.nifi.remote.client.socket;

import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import org.apache.nifi.components.state.StateManager;
import org.apache.nifi.remote.client.SiteToSiteClient;
import org.apache.nifi.remote.client.SiteToSiteClientConfig;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.LinkedHashSet;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;

public class TestSiteToSiteClient {

    @Test
    public void testSerialization() {
        final SiteToSiteClientConfig clientConfig = new SiteToSiteClient.Builder()
                .url("http://localhost:8080/nifi")
                .portName("input")
                .buildConfig();

        final Kryo kryo = new Kryo();

        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        final Output output = new Output(out);

        try {
            kryo.writeObject(output, clientConfig);
        } finally {
            output.close();
        }

        final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        final Input input = new Input(in);

        try {
            SiteToSiteClientConfig clientConfig2 = kryo.readObject(input, SiteToSiteClient.StandardSiteToSiteClientConfig.class);
            assertEquals(clientConfig.getUrls(), clientConfig2.getUrls());
        } finally {
            input.close();
        }
    }

    @Test
    public void testSerializationWithStateManager() {
        final StateManager stateManager = Mockito.mock(StateManager.class);
        final SiteToSiteClientConfig clientConfig = new SiteToSiteClient.Builder()
            .url("http://localhost:8080/nifi")
            .portName("input")
            .stateManager(stateManager)
            .buildConfig();

        final Kryo kryo = new Kryo();

        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        final Output output = new Output(out);

        try {
            kryo.writeObject(output, clientConfig);
        } finally {
            output.close();
        }

        final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        final Input input = new Input(in);

        try {
            SiteToSiteClientConfig clientConfig2 = kryo.readObject(input, SiteToSiteClient.StandardSiteToSiteClientConfig.class);
            assertEquals(clientConfig.getUrls(), clientConfig2.getUrls());
            // Serialization works, but the state manager is not serialized.
            assertNotNull(clientConfig.getStateManager());
            assertNull(clientConfig2.getStateManager());
        } finally {
            input.close();
        }
    }

    @Test
    public void testGetUrlBackwardCompatibility() {
        final Set<String> urls = new LinkedHashSet<>();
        urls.add("http://node1:8080/nifi");
        urls.add("http://node2:8080/nifi");
        final SiteToSiteClientConfig config = new SiteToSiteClient.Builder()
                .urls(urls)
                .buildConfig();

        assertEquals("http://node1:8080/nifi", config.getUrl());
        assertEquals(urls, config.getUrls());
    }

}