com.acme.CodeDrivenProcessor.java Source code

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Here is the source code for com.acme.CodeDrivenProcessor.java

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/*
 * Copyright 2014 the original author or authors.
 * 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.acme;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.util.function.Function;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.integration.annotation.MessageEndpoint;
import org.springframework.integration.annotation.Transformer;
import org.springframework.xd.rxjava.Processor;
import org.springframework.xd.tuple.Tuple;

import static org.springframework.xd.tuple.TupleBuilder.tuple;

import rx.Observable;

/**
 * @author Andy Clement
 */
public abstract class CodeDrivenProcessor implements Processor<Tuple, Tuple> {

    private static Log logger = LogFactory.getLog(Code.class);

    protected Processor<Tuple, Tuple> delegate;

    public CodeDrivenProcessor(String resource) {
        // 1. load the resource
        // 2. deserialize the lambda
        System.out.println("resource=" + resource);
        if (resource == null)
            return;
        try {
            // InputStream is = new FileInputStream(new File("/tmp/bytes"));//
            InputStream is = this.getClass().getClassLoader().getResourceAsStream(resource);
            if (is == null)
                return;
            System.out.println("deserializing");
            ObjectInputStream ois = new ObjectInputStream(is);
            delegate = (Processor<Tuple, Tuple>) ois.readObject();
            ois.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    @Override
    public Observable<Tuple> process(Observable<Tuple> inputStream) {
        return delegate.process(inputStream);
        //      return inputStream.map(tuple -> { return tuple.getValue("title");}).map(data -> tuple().of("x",data));//.map(data -> tuple().of("wobble",data));
        //      return fn.apply(inputStream);
        //      return inputStream.map(tuple -> {
        //         logger.info("Got data = " + tuple.toString());
        //         return tuple.getDouble("measurement");
        //      }).buffer(5).map(data -> tuple().of("average", avg(data)));
    }

}