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From olegz <...@git.apache.org>
Subject [GitHub] nifi pull request: NIFI-865 added initial support for AMQP publish...
Date Tue, 02 Feb 2016 16:51:48 GMT
Github user olegz commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/200#discussion_r51596690
  
    --- Diff: nifi-nar-bundles/nifi-amqp-bundle/nifi-amqp-processors/src/main/java/org/apache/nifi/amqp/processors/AMQPUtils.java
---
    @@ -0,0 +1,115 @@
    +/*
    + * 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 org.apache.nifi.amqp.processors;
    +
    +import java.lang.reflect.Method;
    +import java.lang.reflect.Modifier;
    +import java.util.Arrays;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.nifi.flowfile.FlowFile;
    +import org.apache.nifi.processor.ProcessSession;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import com.rabbitmq.client.AMQP.BasicProperties;
    +
    +/**
    + * Utility helper class simplify interructions with target AMQP API and NIFI
    + * API.
    + *
    + */
    +abstract class AMQPUtils {
    +
    +    public final static String AMQP_PROP_DELIMITER = "$";
    +
    +    public final static String AMQP_PROP_PREFIX = "amqp" + AMQP_PROP_DELIMITER;
    +
    +    private final static Logger logger = LoggerFactory.getLogger(AMQPUtils.class);
    +
    +    private final static List<String> propertyNames = Arrays.asList("amqp$contentType",
"amqp$contentEncoding",
    +            "amqp$headers", "amqp$deliveryMode", "amqp$priority", "amqp$correlationId",
"amqp$replyTo",
    +            "amqp$expiration", "amqp$messageId", "amqp$timestamp", "amqp$type", "amqp$userId",
"amqp$appId",
    +            "amqp$clusterId");
    +    /**
    +     * Returns a {@link List} of AMQP property names defined in
    +     * {@link BasicProperties}
    +     */
    +    public static List<String> getAmqpPropertyNames() {
    +        return propertyNames;
    +    }
    +
    +    /**
    +     * Updates {@link FlowFile} with attributes representing AMQP properties
    +     *
    +     * @param amqpProperties
    +     *            instance of {@link BasicProperties}
    +     * @param flowFile
    +     *            instance of target {@link FlowFile}
    +     * @param processSession
    +     *            instance of {@link ProcessSession}
    +     */
    +    public static FlowFile updateFlowFileAttributesWithAmqpProperties(BasicProperties
amqpProperties, FlowFile flowFile, ProcessSession processSession) {
    --- End diff --
    
    It may very well, but its a utility class that hides the complexity so user only sees
simplicity.


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