https://java-design-patterns.com/assets/js/patterns_master-worker_index.html.ff597452.js

1"use strict";(self.webpackChunkjava_design_patterns_vuepress_web=self.webpackChunkjava_design_patterns_vuepress_web||[]).push([[13276],{55615(s,i){i.A=(s,i)=>{const a=s.__vccOpts||s;for(const[s,e]of i)a[s]=e;return a}},83390(s,i,a){a.r(i),a.d(i,{comp:()=>l,data:()=>r});var e=a(19195);const n=a.p+"assets/img/master-worker-sequence-diagram.9805eb77.png",t={},l=(0,a(55615).A)(t,[["render",function(s,i){return(0,e.uX)(),(0,e.CE)("div",null,[...i[0]||(i[0]=[(0,e.Fv)('<h2 id="also-known-as" tabindex="-1"><a class="header-anchor" href="#also-known-as"><span>Also known as</span></a></h2><ul><li>Master-Slave</li><li>Controller-Worker</li></ul><h2 id="intent-of-master-worker-design-pattern" tabindex="-1"><a class="header-anchor" href="#intent-of-master-worker-design-pattern"><span>Intent of Master-Worker Design Pattern</span></a></h2><p>The Master-Worker design pattern is designed to perform parallel computations by distributing tasks between a master process and multiple worker processes. This pattern enhances concurrency, performance, and scalability in software systems.</p><h2 id="detailed-explanation-of-master-worker-pattern-with-real-world-examples" tabindex="-1"><a class="header-anchor" href="#detailed-explanation-of-master-worker-pattern-with-real-world-examples"><span>Detailed Explanation of Master-Worker Pattern with Real-World Examples</span></a></h2><p>Real-world example</p><blockquote><p>The Master-Worker pattern optimizes parallel task processing and throughput. For instance, in a restaurant kitchen, the head chef (master) delegates tasks to line cooks (workers), who work concurrently to prepare the order. The head chef receives the orders from the dining area and breaks down each order into specific tasks, such as grilling meat, preparing salads, and cooking desserts. Each task is assigned to a different line cook based on their expertise and current workload. The line cooks work in parallel to prepare their portion of the order, while the head chef oversees the process, ensuring everything is prepared correctly and timely. Once each component of the order is ready, the head chef gathers all parts, gives them a final check, and then plates the dishes for service. This kitchen operation mimics the Master-Worker pattern by distributing and managing tasks to optimize efficiency and output.</p></blockquote><p>In plain words</p><blockquote><p>The Master-Worker pattern involves a master process delegating tasks to multiple worker processes, which execute them concurrently and report back, optimizing parallel task processing and throughput.</p></blockquote><p>Wikipedia says</p><blockquote><p>Master–slave is a model of asymmetric communication or control where one device or process (the master) controls one or more other devices or processes (the slaves) and serves as their communication hub. In some systems, a master is selected from a group of eligible devices, with the other devices acting in the role of slaves.</p></blockquote><p>Sequence diagram</p><p><img src="'+n+'" alt="Master-Worker sequence diagram"></p><h2 id="programmatic-example-of-master-worker-pattern-in-java" tabindex="-1"><a class="header-anchor" href="#programmatic-example-of-master-worker-pattern-in-java"><span>Programmatic Example of Master-Worker Pattern in Java</span></a></h2><p>In the provided code, the <code>MasterWorker</code> class initiates the concurrent computation process. The <code>Master</code> class divides the work among <code>Worker</code> objects, each performing its task in parallel, thus optimizing task processing and enhancing system efficiency.</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="--shiki-light:#383A42;--shiki-dark:#abb2bf;--shiki-light-bg:#FAFAFA;--shiki-dark-bg:#282c34;"><pre class="shiki shiki-themes one-light one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">// The MasterWorker class acts as the main entry point for the Master-Worker system.</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> class</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> MasterWorker</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  private</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Master</span><span style="--shiki-light:#E45649;--shiki-dark:#E06C75;"> master</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">;</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> MasterWorker</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Master</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> master</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">    this</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">master</span><span style="--shiki-light:#383A42;--shiki-dark:#56B6C2;"> =</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> master;</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Result</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> getResult</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Input</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">    return</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;"> master</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;">computeResult</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(input);</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>In this code, the <code>MasterWorker</code> class is initialized with a <code>Master</code> object. The <code>getResult</code> method is used to start the computation process.</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="--shiki-light:#383A42;--shiki-dark:#abb2bf;--shiki-light-bg:#FAFAFA;--shiki-dark-bg:#282c34;"><pre class="shiki shiki-themes one-light one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">// The Master class is responsible for dividing the work among the workers.</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> class</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Master</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  protected</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> List</span><span style="--shiki-light:#E45649;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Worker</span><span style="--shiki-light:#E45649;--shiki-dark:#ABB2BF;">&gt;</span><span style="--shiki-light:#E45649;--shiki-dark:#E06C75;"> workers</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">;</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> Master</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">List</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Worker</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">&gt; </span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;">workers</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">    this</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">workers</span><span style="--shiki-light:#383A42;--shiki-dark:#56B6C2;"> =</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> workers;</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Result</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> computeResult</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Input</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">);</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>The <code>Master</code> class has a list of <code>Worker</code> objects. The <code>computeResult</code> method is abstract and should be implemented in a subclass to define how the work is divided and how the results are aggregated.</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="--shiki-light:#383A42;--shiki-dark:#abb2bf;--shiki-light-bg:#FAFAFA;--shiki-dark-bg:#282c34;"><pre class="shiki shiki-themes one-light one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">// The Worker class is responsible for performing the actual computation.</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> class</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Worker</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> extends</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Thread</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  protected</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Input</span><span style="--shiki-light:#E45649;--shiki-dark:#E06C75;"> input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">;</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> void</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> setInput</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Input</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">    this</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">input</span><span style="--shiki-light:#383A42;--shiki-dark:#56B6C2;"> =</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> input;</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Result</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> compute</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">();</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>The <code>Worker</code> class extends <code>Thread</code>, allowing it to perform computations in parallel. The <code>compute</code> method is abstract and should be implemented in a subclass to define the actual computation logic.</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="--shiki-light:#383A42;--shiki-dark:#abb2bf;--shiki-light-bg:#FAFAFA;--shiki-dark-bg:#282c34;"><pre class="shiki shiki-themes one-light one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="--shiki-light:#A0A1A7;--shiki-light-font-style:italic;--shiki-dark:#7F848E;--shiki-dark-font-style:italic;">// The Input and Result classes are used to encapsulate the input data and the result data.</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> class</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Input</

1span><span style="--shiki-light:#C18401;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">T</span><span style="--shiki-light:#C18401;--shiki-dark:#ABB2BF;">&gt;</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> final</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> T</span><span style="--shiki-light:#E45649;--shiki-dark:#E06C75;"> data</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">;</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> Input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">T</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> data</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">    this</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">data</span><span style="--shiki-light:#383A42;--shiki-dark:#56B6C2;"> =</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> data;</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> List</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">Input</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">T</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">&gt;&gt;</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> divideData</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">int</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> num</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">);</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">}</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> abstract</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> class</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> Result</span><span style="--shiki-light:#C18401;--shiki-dark:#ABB2BF;">&lt;</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">T</span><span style="--shiki-light:#C18401;--shiki-dark:#ABB2BF;">&gt;</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;"> final</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;"> T</span><span style="--shiki-light:#E45649;--shiki-dark:#E06C75;"> data</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">;</span></span>\n<span class="line"></span>\n<span class="line"><span style="--shiki-light:#A626A4;--shiki-dark:#C678DD;">  public</span><span style="--shiki-light:#4078F2;--shiki-dark:#61AFEF;"> Result</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">(</span><span style="--shiki-light:#C18401;--shiki-dark:#E5C07B;">T</span><span style="--shiki-light:#383A42;--shiki-light-font-style:inherit;--shiki-dark:#E06C75;--shiki-dark-font-style:italic;"> data</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">)</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> {</span></span>\n<span class="line"><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">    this</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">.</span><span style="--shiki-light:#E45649;--shiki-dark:#E5C07B;">data</span><span style="--shiki-light:#383A42;--shiki-dark:#56B6C2;"> =</span><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;"> data;</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">  }</span></span>\n<span class="line"><span style="--shiki-light:#383A42;--shiki-dark:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>The <code>Input</code> class has a <code>divideData</code> method that is used to divide the input data into subtasks. The <code>Result</code> class simply encapsulates the result data.</p><h2 id="when-to-use-the-master-worker-pattern-in-java" tabindex="-1"><a class="header-anchor" href="#when-to-use-the-master-worker-pattern-in-java"><span>When to Use the Master-Worker Pattern in Java</span></a></h2><ul><li>Suitable for scenarios where a task can be decomposed into smaller, independent tasks.</li><li>Useful in applications requiring concurrent execution to enhance performance.</li><li>Applicable in distributed computing where tasks need to be processed by multiple processors or machines.</li></ul><h2 id="master-worker-pattern-java-tutorials" tabindex="-1"><a class="header-anchor" href="#master-worker-pattern-java-tutorials"><span>Master-Worker Pattern Java Tutorials</span></a></h2><ul><li><a href="https://docs.gigaspaces.com/sbp/master-worker-pattern.html" target="_blank" rel="noopener noreferrer">Master-Worker Pattern (Gigaspaces)</a></li></ul><h2 id="real-world-applications-of-master-worker-pattern-in-java" tabindex="-1"><a class="header-anchor" href="#real-world-applications-of-master-worker-pattern-in-java"><span>Real-World Applications of Master-Worker Pattern in Java</span></a></h2><ul><li>Implemented in distributed systems to manage tasks across different c

1omputing resources.</li><li>Used in server architectures to process multiple client requests simultaneously.</li><li>Utilized in scientific computation frameworks where large datasets require parallel processing.</li></ul><h2 id="benefits-and-trade-offs-of-master-worker-pattern" tabindex="-1"><a class="header-anchor" href="#benefits-and-trade-offs-of-master-worker-pattern"><span>Benefits and Trade-offs of Master-Worker Pattern</span></a></h2><p>Benefits:</p><ul><li>Enhances performance by parallelizing tasks.</li><li>Increases responsiveness of systems handling large volumes of requests.</li><li>Provides a clear separation of concerns between task coordination and task execution, simplifying design.</li></ul><p>Trade-offs:</p><ul><li>Complexity in managing synchronization and state consistency between master and workers.</li><li>Overhead of managing communication between master and workers, especially in distributed environments.</li></ul><h2 id="related-java-design-patterns" tabindex="-1"><a class="header-anchor" href="#related-java-design-patterns"><span>Related Java Design Patterns</span></a></h2><ul><li>Task Parallelism and Data Parallelism: Master-Worker utilizes these patterns to divide work into tasks or data segments.</li><li><a href="https://java-design-patterns.com/patterns/producer-consumer/" target="_blank" rel="noopener noreferrer">Producer-Consumer</a>: Similar in structure but focuses on balancing production and consumption rates; Master-Worker is more about task distribution and aggregation.</li><li><a href="https://java-design-patterns.com/patterns/pipeline/" target="_blank" rel="noopener noreferrer">Pipeline</a>: Both organize processing steps but Pipeline arranges them linearly whereas Master-Worker may not impose such a sequence.</li></ul><h2 id="references-and-credits" tabindex="-1"><a class="header-anchor" href="#references-and-credits"><span>References and Credits</span></a></h2><ul><li><a href="https://amzn.to/3UN2vbH" target="_blank" rel="noopener noreferrer">Distributed Systems: Principles and Paradigms</a></li><li><a href="https://amzn.to/4aRMruW" target="_blank" rel="noopener noreferrer">Java Concurrency in Practice</a></li><li><a href="https://amzn.to/3UgC24V" target="_blank" rel="noopener noreferrer">Pattern-Oriented Software Architecture Volume 2: Patterns for Concurrent and Networked Objects</a></li></ul>',38)])])}]]),r=JSON.parse('{"path":"/patterns/master-worker/","title":"Master-Worker Pattern in Java: Coordinating Concurrent Processing with Ease","lang":"en-US","frontmatter":{"title":"Master-Worker Pattern in Java: Coordinating Concurrent Processing with Ease","shortTitle":"Master-Worker","description":"Discover the Master-Worker design pattern in Java. Learn how it improves concurrency, scalability, and performance through parallel task processing. Includes real-world examples and code snippets.","category":"Concurrency","language":"en","tag":["Multithreading","Performance","Scalability"],"head":[["script",{"type":"application/ld+json"},"{\\"@context\\":\\"https://schema.org\\",\\"@type\\":\\"Article\\",\\"headline\\":\\"Master-Worker Pattern in Java: Coordinating Concurrent Processing with Ease\\",\\"image\\":[\\"\\"],\\"dateModified\\":null,\\"author\\":[{\\"@type\\":\\"Person\\",\\"name\\":\\"iluwatar\\",\\"url\\":\\"https://github.com/iluwatar/java-design-patterns-vuepress-web\\"}]}"],["meta",{"property":"og:url","content":"https://java-design-patterns.com/patterns/master-worker/"}],["meta",{"property":"og:site_name","content":"Java Design Patterns"}],["meta",{"property":"og:title","content":"Master-Worker Pattern in Java: Coordinating Concurrent Processing with Ease"}],["meta",{"property":"og:description","content":"Discover the Master-Worker design pattern in Java. Learn how it improves concurrency, scalability, and performance through parallel task processing. Includes real-world examples and code snippets."}],["meta",{"property":"og:type","content":"article"}],["meta",{"property":"og:locale","content":"en-US"}],["meta",{"property":"article:tag","content":"Scalability"}],["meta",{"property":"article:tag","content":"Performance"}],["meta",{"property":"article:tag","content":"Multithreading"}]]},"git":{},"readingTime":{"minutes":3.1,"words":930},"excerpt":"<h2>Also known as</h2>\\n<ul>\\n<li>Master-Slave</li>\\n<li>Controller-Worker</li>\\n</ul>\\n<h2>Intent of Master-Worker Design Pattern</h2>\\n<p>The Master-Worker design pattern is designed to perform parallel computations by distributing tasks between a master process and multiple worker processes. This pattern enhances concurrency, performance, and scalability in software systems.</p>"}')}}]);