flink-library-siddhi/src/test/java/org/apache/flink/streaming/siddhi/operator/SiddhiSyntaxTest.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
 * <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.flink.streaming.siddhi.operator;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.wso2.siddhi.core.SiddhiAppRuntime;
import org.wso2.siddhi.core.SiddhiManager;
import org.wso2.siddhi.core.event.Event;
import org.wso2.siddhi.core.stream.input.InputHandler;
import org.wso2.siddhi.core.stream.output.StreamCallback;

import java.util.ArrayList;
import java.util.List;

public class SiddhiSyntaxTest {

    private SiddhiManager siddhiManager;

    @Before
    public void setUp() {
        siddhiManager = new SiddhiManager();
    }

    @After
    public void after() {
        siddhiManager = new SiddhiManager();
    }

    @Test
    public void testSimplePlan() throws InterruptedException {
        SiddhiAppRuntime runtime = siddhiManager.createSiddhiAppRuntime(
            "define stream inStream (name string, value double);"
                + "from inStream insert into outStream");
        runtime.start();

        final List<Object[]> received = new ArrayList<>(3);
        InputHandler inputHandler = runtime.getInputHandler("inStream");
        Assert.assertNotNull(inputHandler);

        try {
            runtime.getInputHandler("unknownStream");
            Assert.fail("Should throw exception for getting input handler for unknown streamId.");
        } catch (Exception ex) {
            // Expected exception for getting input handler for illegal streamId.
        }

        runtime.addCallback("outStream", new StreamCallback() {
            @Override
            public void receive(Event[] events) {
                for (Event event : events) {
                    received.add(event.getData());
                }
            }
        });

        inputHandler.send(new Object[]{"a", 1.1});
        inputHandler.send(new Object[]{"b", 1.2});
        inputHandler.send(new Object[]{"c", 1.3});
        Thread.sleep(100);
        Assert.assertEquals(3, received.size());
        Assert.assertArrayEquals(received.get(0), new Object[]{"a", 1.1});
        Assert.assertArrayEquals(received.get(1), new Object[]{"b", 1.2});
        Assert.assertArrayEquals(received.get(2), new Object[]{"c", 1.3});
    }
}