package com.design.l.command;
/*** 程序设计员*/
public class Programmer {private String userName;public Programmer(String userName) {super();this.userName = userName;}public void handleDemand(){System.out.println("程序员 : " + userName + " ,正在处理新需求 ... ...");}public void handleBug(){System.out.println("程序员 : " + userName + " ,正在处理Bug ... ...");}public void handleProblem(){System.out.println("程序员 : " + userName + " ,正在处理线上问题 ... ...");}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}
}

package com.design.l.command;import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;/*** 产品经理*/
public class ProductManager {//任务集合private List<TaskService> taskList;//程序员private List<Programmer> programmerList;private static final int TASK_MAX_NUM = 4;//任务最大数量private int idx = 0;public ProductManager(Programmer ... programmers) {super();this.taskList = new ArrayList<>();this.programmerList = Arrays.asList(programmers);}//新增任务public void addTaskToProduct(TaskService taskService){taskList.add(taskService);}//分配任务public void assignments(){TaskService[] copy = new TaskService[taskList.size() > TASK_MAX_NUM ? taskList.size() - TASK_MAX_NUM : 0];for ( int i = 0; i < TASK_MAX_NUM && i < taskList.size(); i ++){taskList.get(i).handle();}System.arraycopy(taskList.toArray(), TASK_MAX_NUM > taskList.size() ? taskList.size() : TASK_MAX_NUM, copy, 0, copy.length);taskList = Arrays.asList(copy);}//获取程序员public Programmer chooseProgrammer(){return programmerList.get(idx == programmerList.size() ? 0 : idx ++); }//打印出未处理的任务public void printTask(){if(taskList == null || taskList.size() == 0){System.out.println("----无任务----");return ;}System.out.println("----剩余任务----");for(TaskService task : taskList){System.out.println(task);}}}

package com.design.l.command;
/*** 销售人员*/
public class Sales {private String userName;private ProductManager productManager;//产品经理public Sales(String userName) {super();this.userName = userName;}public Sales(String userName, ProductManager productManager) {super();this.userName = userName;this.productManager = productManager;}public void putDemand(){System.out.println("业务员 : " + userName + ", 提出新需求  ... ... ");productManager.addTaskToProduct(new DemandTaskServiceImpl(productManager.chooseProgrammer()));}public void putBug(){System.out.println("业务员 : " + userName + ", 提出新Bug  ... ... ");productManager.addTaskToProduct(new BugTaskServiceImpl(productManager.chooseProgrammer()));}public void putProblem(){System.out.println("业务员 : " + userName + ", 提出线上问题     ... ... ");productManager.addTaskToProduct(new ProblemTaskServiceImpl(productManager.chooseProgrammer()));}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public ProductManager getProductManager() {return productManager;}public void setProductManager(ProductManager productManager) {this.productManager = productManager;}}

package com.design.l.command;
/*** 任务接口*/
public interface TaskService {/*** 任务处理方法*/void handle();
}

package com.design.l.command;
/*** 新需求任务*/
public class DemandTaskServiceImpl implements TaskService {private Programmer programmer;public DemandTaskServiceImpl(Programmer programmer) {super();this.programmer = programmer;}@Overridepublic void handle() {programmer.handleDemand();}}

package com.design.l.command;
/*** Bug任务*/
public class BugTaskServiceImpl implements TaskService {private Programmer programmer;public BugTaskServiceImpl(Programmer programmer) {super();this.programmer = programmer;}@Overridepublic void handle() {programmer.handleBug();}}

package com.design.l.command;
/*** 线上问题任务*/
public class ProblemTaskServiceImpl implements TaskService {private Programmer programmer;public ProblemTaskServiceImpl(Programmer programmer) {super();this.programmer = programmer;}@Overridepublic void handle() {programmer.handleProblem();}}

package com.design.l.command;
/*** 12-命令模式*/
public class MainTest {public static void main(String[] args) {Programmer programmerA = new Programmer("程序员A");ProductManager productManager = new ProductManager(programmerA);Sales salesA = new Sales("业务员A", productManager);Sales salesB = new Sales("业务员B", productManager);Sales salesC = new Sales("业务员C", productManager);Sales salesD = new Sales("业务员D", productManager);salesA.putDemand();salesA.putBug();salesB.putProblem();salesC.putBug();salesD.putProblem();productManager.assignments();productManager.printTask();productManager.assignments();productManager.printTask();}}

业务员 : 业务员A, 提出新需求  ... ...
业务员 : 业务员A, 提出新Bug  ... ...
业务员 : 业务员B, 提出线上问题     ... ...
业务员 : 业务员C, 提出新Bug  ... ...
业务员 : 业务员D, 提出线上问题     ... ...
程序员 : 程序员A ,正在处理新需求 ... ...
程序员 : 程序员A ,正在处理Bug ... ...
程序员 : 程序员A ,正在处理线上问题 ... ...
程序员 : 程序员A ,正在处理Bug ... ...
----剩余任务----
com.design.l.command.ProblemTaskServiceImpl@15db9742
程序员 : 程序员A ,正在处理线上问题 ... ...
----无任务----