org.alanwilliamson.amazon.lambda.LambdaExecute.java Source code

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Here is the source code for org.alanwilliamson.amazon.lambda.LambdaExecute.java

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/* 
 *  Copyright (C) 2000 - 2015 aw2.0Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  OpenBD is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with OpenBD.  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://openbd.org/
 *  $Id$
 */
package org.alanwilliamson.amazon.lambda;

import java.nio.ByteBuffer;
import java.util.Map;

import org.alanwilliamson.amazon.AmazonBase;
import org.alanwilliamson.amazon.AmazonKey;

import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.lambda.AWSLambda;
import com.amazonaws.services.lambda.AWSLambdaClientBuilder;
import com.amazonaws.services.lambda.model.InvocationType;
import com.amazonaws.services.lambda.model.InvokeRequest;
import com.amazonaws.services.lambda.model.InvokeResult;
import com.amazonaws.services.lambda.model.LogType;
import com.amazonaws.util.json.Jackson;
import com.naryx.tagfusion.cfm.engine.cfArgStructData;
import com.naryx.tagfusion.cfm.engine.cfBooleanData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;
import com.naryx.tagfusion.cfm.tag.tagUtils;

/**
 * Execute of a Lambda Function
 * 
 * @author Amanda
 *
 */
public class LambdaExecute extends AmazonBase {

    private static final long serialVersionUID = 1L;

    public LambdaExecute() {
        min = 3;
        max = 4;
        setNamedParams(new String[] { "datasource", "function", "payload", "qualifier" });
    }

    @Override
    public String[] getParamInfo() {
        return new String[] { "Lambda Session", "Lambda Function Name", "JSON Payload for the Lambda Function",
                "Lambda Function Alias" };
    }

    @Override
    public java.util.Map<String, String> getInfo() {
        return makeInfo("amazon", "Amazon Lambda: executes a lambda function", ReturnType.STRUCTURE);
    }

    /**
     * Executes a lambda function and returns the result of the execution.
     */
    @Override
    public cfData execute(cfSession _session, cfArgStructData argStruct) throws cfmRunTimeException {

        AmazonKey amazonKey = getAmazonKey(_session, argStruct);

        // Arguments to extract
        String payload = getNamedStringParam(argStruct, "payload", null);
        String functionName = getNamedStringParam(argStruct, "function", null);
        String qualifier = getNamedStringParam(argStruct, "qualifier", null);

        try {

            // Construct the Lambda Client
            InvokeRequest invokeRequest = new InvokeRequest();
            invokeRequest.setInvocationType(InvocationType.RequestResponse);
            invokeRequest.setLogType(LogType.Tail);
            invokeRequest.setFunctionName(functionName);
            invokeRequest.setPayload(payload);
            if (qualifier != null) {
                invokeRequest.setQualifier(qualifier);
            }

            // Lambda client must be created with credentials
            BasicAWSCredentials awsCreds = new BasicAWSCredentials(amazonKey.getKey(), amazonKey.getSecret());
            AWSLambda awsLambda = AWSLambdaClientBuilder.standard()
                    .withRegion(amazonKey.getAmazonRegion().toAWSRegion().getName())
                    .withCredentials(new AWSStaticCredentialsProvider(awsCreds)).build();

            // Execute and process the results
            InvokeResult result = awsLambda.invoke(invokeRequest);

            // Convert the returned result
            ByteBuffer resultPayload = result.getPayload();
            String resultJson = new String(resultPayload.array(), "UTF-8");
            Map<String, Object> resultMap = Jackson.fromJsonString(resultJson, Map.class);

            return tagUtils.convertToCfData(resultMap);

        } catch (Exception e) {
            throwException(_session, "AmazonLambdaExecute: " + e.getMessage());
            return cfBooleanData.FALSE;
        }

    }

}