PartitionSample.java

/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * 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 org.wso2.siddhi.sample;

import org.wso2.siddhi.core.ExecutionPlanRuntime;
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 org.wso2.siddhi.core.util.EventPrinter;

public class PartitionSample {

    public static void main(String[] args) throws InterruptedException {

        // Creating Siddhi Manager
        SiddhiManager siddhiManager = new SiddhiManager();


        String executionPlan = "" +
                "define stream cseEventStream (symbol string, price float,volume int);" +
                "" +
                "partition with (symbol of cseEventStream)" +
                "begin" +
                "   @info(name = 'query') " +
                "   from cseEventStream " +
                "   select symbol, sum(price) as price, volume " +
                "   insert into OutStockStream ;" +
                "end ";

        //Generating runtime
        ExecutionPlanRuntime executionPlanRuntime = siddhiManager.createExecutionPlanRuntime(executionPlan);

        //Adding callback to retrieve output events from stream
        executionPlanRuntime.addCallback("OutStockStream", new StreamCallback() {
            @Override
            public void receive(Event[] events) {
                EventPrinter.print(events);
            }
        });

        //Retrieving InputHandler to push events into Siddhi
        InputHandler inputHandler = executionPlanRuntime.getInputHandler("cseEventStream");

        //Starting event processing
        executionPlanRuntime.start();

        //Sending events to Siddhi
        inputHandler.send(new Object[]{"IBM", 75f, 100});
        inputHandler.send(new Object[]{"WSO2", 705f, 100});
        inputHandler.send(new Object[]{"IBM", 35f, 100});
        inputHandler.send(new Object[]{"ORACLE", 50.0f, 100});
        Thread.sleep(1000);

        //Shutting down the runtime
        executionPlanRuntime.shutdown();

        //Shutting down Siddhi
        siddhiManager.shutdown();
    }
}