com.hortonworks.processors.network.GetTcpDumpAttributes.java Source code

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Here is the source code for com.hortonworks.processors.network.GetTcpDumpAttributes.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
 *
 * 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.hortonworks.processors.network;

import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.PropertyValue;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.processor.*;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.nifi.annotation.behavior.ReadsAttribute;
import org.apache.nifi.annotation.behavior.ReadsAttributes;
import org.apache.nifi.annotation.behavior.WritesAttribute;
import org.apache.nifi.annotation.behavior.WritesAttributes;
import org.apache.nifi.annotation.lifecycle.OnScheduled;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
import org.apache.nifi.annotation.documentation.SeeAlso;
import org.apache.nifi.annotation.documentation.Tags;
import org.apache.nifi.processor.exception.ProcessException;
import org.apache.nifi.processor.io.InputStreamCallback;
import org.apache.nifi.processor.io.StreamCallback;
import org.apache.nifi.processor.util.StandardValidators;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.*;

//Define the processor tags and description which will be displayed on Nifi UI
@Tags({ "fetch", "tcpdump", "tcp", "network" })
@CapabilityDescription("Reads output of tcpdump and outputs the results as a Flowfile")
@SeeAlso({})
@ReadsAttributes({ @ReadsAttribute(attribute = "", description = "") })
@WritesAttributes({ @WritesAttribute(attribute = "", description = "") })
public class GetTcpDumpAttributes extends AbstractProcessor {

    //Define properties for the processor
    public static final PropertyDescriptor MY_PROPERTY = new PropertyDescriptor.Builder().name("My Property")
            .description("Example Property").required(true).addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
            .build();

    //Define relationships for the processor
    public static final Relationship SUCCESS_RELATIONSHIP = new Relationship.Builder().name("success")
            .description("Success relationship").build();

    private List<PropertyDescriptor> descriptors;

    private Set<Relationship> relationships;

    //Called at the start of Nifi
    //Note that unmodifiable List and Set used since Nifi is multi-threaded
    @Override
    protected void init(final ProcessorInitializationContext context) {
        final List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>();
        descriptors.add(MY_PROPERTY);
        this.descriptors = Collections.unmodifiableList(descriptors);

        final Set<Relationship> relationships = new HashSet<Relationship>();
        relationships.add(SUCCESS_RELATIONSHIP);
        this.relationships = Collections.unmodifiableSet(relationships);
    }

    @Override
    public Set<Relationship> getRelationships() {
        return this.relationships;
    }

    @Override
    public final List<PropertyDescriptor> getSupportedPropertyDescriptors() {
        return descriptors;
    }

    @OnScheduled
    public void onScheduled(final ProcessContext context) {

    }

    //Called when flow file is passes to the processor
    @Override
    public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
        FlowFile flowFile = session.get();
        if (flowFile == null) {
            return;
        }

        flowFile.getAttributes();

        final Map<String, String> attributes = new HashMap<>();
        session.read(flowFile, new InputStreamCallback() {

            @Override
            public void process(InputStream in) throws IOException {
                // Parse the data as string and extract scr/dest host/ports
                String data = IOUtils.toString(in);
                String[] components = StringUtils.split(data);
                attributes.put("src.socket", components[2]);
                attributes.put("dest.socket", StringUtils.replace(components[4], ":", ""));

            }
        });

        //write out attributes to Flow file
        flowFile = session.putAllAttributes(flowFile, attributes);

        session.transfer(flowFile, SUCCESS_RELATIONSHIP);

    }

}