ComputeServer.java
package org.drip.service.engine;
/*
* -*- mode: java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*/
/*!
* Copyright (C) 2020 Lakshmi Krishnamurthy
* Copyright (C) 2019 Lakshmi Krishnamurthy
* Copyright (C) 2018 Lakshmi Krishnamurthy
* Copyright (C) 2017 Lakshmi Krishnamurthy
* Copyright (C) 2016 Lakshmi Krishnamurthy
*
* This file is part of DROP, an open-source library targeting analytics/risk, transaction cost analytics,
* asset liability management analytics, capital, exposure, and margin analytics, valuation adjustment
* analytics, and portfolio construction analytics within and across fixed income, credit, commodity,
* equity, FX, and structured products. It also includes auxiliary libraries for algorithm support,
* numerical analysis, numerical optimization, spline builder, model validation, statistical learning,
* and computational support.
*
* https://lakshmidrip.github.io/DROP/
*
* DROP is composed of three modules:
*
* - DROP Product Core - https://lakshmidrip.github.io/DROP-Product-Core/
* - DROP Portfolio Core - https://lakshmidrip.github.io/DROP-Portfolio-Core/
* - DROP Computational Core - https://lakshmidrip.github.io/DROP-Computational-Core/
*
* DROP Product Core implements libraries for the following:
* - Fixed Income Analytics
* - Loan Analytics
* - Transaction Cost Analytics
*
* DROP Portfolio Core implements libraries for the following:
* - Asset Allocation Analytics
* - Asset Liability Management Analytics
* - Capital Estimation Analytics
* - Exposure Analytics
* - Margin Analytics
* - XVA Analytics
*
* DROP Computational Core implements libraries for the following:
* - Algorithm Support
* - Computation Support
* - Function Analysis
* - Model Validation
* - Numerical Analysis
* - Numerical Optimizer
* - Spline Builder
* - Statistical Learning
*
* Documentation for DROP is Spread Over:
*
* - Main => https://lakshmidrip.github.io/DROP/
* - Wiki => https://github.com/lakshmiDRIP/DROP/wiki
* - GitHub => https://github.com/lakshmiDRIP/DROP
* - Repo Layout Taxonomy => https://github.com/lakshmiDRIP/DROP/blob/master/Taxonomy.md
* - Javadoc => https://lakshmidrip.github.io/DROP/Javadoc/index.html
* - Technical Specifications => https://github.com/lakshmiDRIP/DROP/tree/master/Docs/Internal
* - Release Versions => https://lakshmidrip.github.io/DROP/version.html
* - Community Credits => https://lakshmidrip.github.io/DROP/credits.html
* - Issues Catalog => https://github.com/lakshmiDRIP/DROP/issues
* - JUnit => https://lakshmidrip.github.io/DROP/junit/index.html
* - Jacoco => https://lakshmidrip.github.io/DROP/jacoco/index.html
*
* 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.
*/
/**
* <i>ComputeServer</i> contains the Functionality behind the DROP API Compute Service Engine.
*
* <br><br>
* <ul>
* <li><b>Module </b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/ComputationalCore.md">Computational Core Module</a></li>
* <li><b>Library</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/ComputationSupportLibrary.md">Computation Support</a></li>
* <li><b>Project</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/service/README.md">Environment, Product/Definition Containers, and Scenario/State Manipulation APIs</a></li>
* <li><b>Package</b> = <a href = "https://github.com/lakshmiDRIP/DROP/tree/master/src/main/java/org/drip/service/engine/README.md">Compute Engine Request-Response Thunker</a></li>
* </ul>
* <br><br>
*
* @author Lakshmi Krishnamurthy
*/
public class ComputeServer {
/**
* The DRIP compute Service Engine Port
*/
public static final int DRIP_COMPUTE_ENGINE_PORT = 9090;
private int _iListenerPort = -1;
private java.net.ServerSocket _socketListener = null;
/**
* Create a Standard Instance of the ComputeServer
*
* @return The Standard ComputeServer Instance
*/
public static final ComputeServer Standard()
{
try {
ComputeServer cs = new ComputeServer (DRIP_COMPUTE_ENGINE_PORT);
return cs.initialize() ? cs : null;
} catch (java.lang.Exception e) {
e.printStackTrace();
}
return null;
}
/**
* ComputServer Constructor
*
* @param iListenerPort The Listener Port
*
* @throws java.lang.Exception Thrown if the Inputs are Invalid
*/
public ComputeServer (
final int iListenerPort)
throws java.lang.Exception
{
if (0 >= (_iListenerPort = iListenerPort))
throw new java.lang.Exception ("ComputeServer Constructor => Invalid Inputs");
}
/**
* Initialize the Compute Server Engine Listener Setup
*
* @return TRUE - The Compute Server Engine Listener Setup
*/
public boolean initialize()
{
try {
_socketListener = new java.net.ServerSocket (_iListenerPort);
return true;
} catch (java.lang.Exception e) {
e.printStackTrace();
}
return false;
}
/**
* Spin on the Listener Loop
*
* @return FALSE - Spinning Terminated
*/
public boolean spin()
{
while (true) {
try {
java.net.Socket s = _socketListener.accept();
if (null == s) return false;
java.lang.String strJSONRequest = new java.io.BufferedReader (new java.io.InputStreamReader
(s.getInputStream())).readLine();
System.out.println (strJSONRequest);
java.lang.Object objRequest = org.drip.json.simple.JSONValue.parse (strJSONRequest);
if (null == objRequest || !(objRequest instanceof org.drip.json.simple.JSONObject))
return false;
org.drip.json.simple.JSONObject jsonRequest = (org.drip.json.simple.JSONObject) objRequest;
java.lang.Object objResponse = org.drip.json.simple.JSONValue.parse
(org.drip.service.json.KeyHoleSkeleton.Thunker (strJSONRequest));
if (null == objResponse) return false;
org.drip.json.simple.JSONObject jsonResponse = (org.drip.json.simple.JSONObject) objResponse;
if (!org.drip.service.engine.RequestResponseDecorator.AffixResponseHeaders (jsonResponse,
jsonRequest))
return false;
System.out.println ("\n\n" + jsonResponse.toJSONString());
java.io.PrintWriter pw = new java.io.PrintWriter (s.getOutputStream(), true);
pw.write (jsonResponse.toJSONString() + "\n");
pw.flush();
} catch (java.lang.Exception e) {
e.printStackTrace();
return false;
}
}
}
public static final void main (
final java.lang.String[] astrArgs)
throws java.lang.Exception
{
org.drip.service.env.EnvManager.InitEnv ("");
ComputeServer cs = ComputeServer.Standard();
cs.spin();
}
}