samza-test/src/test/java/org/apache/samza/test/table/TestLocalTableWithLowLevelApiEndToEnd.java

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 * 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
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package org.apache.samza.test.table;

import java.util.Map;

import org.apache.samza.application.TaskApplication;
import org.apache.samza.application.descriptors.TaskApplicationDescriptor;
import org.apache.samza.config.Config;
import org.apache.samza.config.MapConfig;
import org.apache.samza.context.Context;
import org.apache.samza.runtime.LocalApplicationRunner;
import org.apache.samza.serializers.IntegerSerde;
import org.apache.samza.serializers.KVSerde;
import org.apache.samza.serializers.NoOpSerde;
import org.apache.samza.storage.kv.inmemory.descriptors.InMemoryTableDescriptor;
import org.apache.samza.system.IncomingMessageEnvelope;
import org.apache.samza.system.descriptors.DelegatingSystemDescriptor;
import org.apache.samza.system.descriptors.GenericInputDescriptor;
import org.apache.samza.table.ReadWriteTable;
import org.apache.samza.task.InitableTask;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.StreamTask;
import org.apache.samza.task.StreamTaskFactory;
import org.apache.samza.task.TaskCoordinator;
import org.apache.samza.test.harness.IntegrationTestHarness;
import org.apache.samza.test.util.Base64Serializer;

import org.junit.Assert;
import org.junit.Test;

import static org.apache.samza.test.table.TestLocalTableEndToEnd.getBaseJobConfig;


public class TestLocalTableWithLowLevelApiEndToEnd extends IntegrationTestHarness {

  @Test
  public void testTableWithLowLevelApi() throws Exception {
    Map<String, String> configs = getBaseJobConfig(bootstrapUrl(), zkConnect());
    configs.put("streams.PageView.samza.system", "test");
    configs.put("streams.PageView.source", Base64Serializer.serialize(TestTableData.generatePageViews(10)));
    configs.put("streams.PageView.partitionCount", String.valueOf(4));
    configs.put("task.inputs", "test.PageView");

    Config config = new MapConfig(configs);
    final LocalApplicationRunner runner = new LocalApplicationRunner(new MyTaskApplication(), config);
    executeRun(runner, config);
    runner.waitForFinish();
  }

  static public class MyTaskApplication implements TaskApplication {
    @Override
    public void describe(TaskApplicationDescriptor appDescriptor) {
      DelegatingSystemDescriptor ksd = new DelegatingSystemDescriptor("test");
      GenericInputDescriptor<TestTableData.PageView> pageViewISD = ksd.getInputDescriptor("PageView", new NoOpSerde<>());
      appDescriptor
          .withInputStream(pageViewISD)
          .withTable(new InMemoryTableDescriptor("t1", KVSerde.of(new IntegerSerde(), new TestTableData.PageViewJsonSerde())))
          .withTaskFactory((StreamTaskFactory) () -> new MyStreamTask());
    }
  }

  static public class MyStreamTask implements StreamTask, InitableTask {
    private ReadWriteTable<Integer, TestTableData.PageView> pageViewTable;
    @Override
    public void init(Context context) {
      pageViewTable = context.getTaskContext().getTable("t1");
    }
    @Override
    public void process(IncomingMessageEnvelope message, MessageCollector collector, TaskCoordinator coordinator) {
      TestTableData.PageView pv = (TestTableData.PageView) message.getMessage();
      pageViewTable.put(pv.getMemberId(), pv);
      TestTableData.PageView pv2 = pageViewTable.get(pv.getMemberId());
      Assert.assertEquals(pv.getMemberId(), pv2.getMemberId());
      Assert.assertEquals(pv.getPageKey(), pv2.getPageKey());
    }
  }
}