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README
Apache-2.0

介绍

轻量级任务编排管理

TaskContext: 执行上下文/执行容器: 存放一组逻辑相关性的TaskWrapper

  • 添加任务 => 等待对列 => 循环取出任务(直到并行限制 或 某个任务结束) => 正在执行对列 => 结束

TaskWrapper: 任务由多个执行单元Step顺序组成

  • 入参 => Step1 => 结果(入参) => Step2 => 结果(入参) => Step3 => 结果

Step: 任务执行单元/执行函数/执行步骤

  • 一般步骤: 执行 => 结果
  • 并行步骤: 多个执行函数并行
  • 可重复步骤: 执行 <=> 执行次数+1 <=> 是否需要重新执行 => 结果

安装教程

<dependency>
    <groupId>cn.xnatural.task</groupId>
    <artifactId>task</artifactId>
    <version>1.0.2</version>
</dependency>

任务基本用法

创建独立任务

new TaskWrapper("task1")
    // 添加执行步骤1
    .step(step -> {
        step.info("执行 step{} ... ", step.num);
    })
    // 添加执行步骤2
    .step(step -> {
        step.info("执行 step{} ... ", step.num);
    })
    // 可继续添加更多步骤
    .run();
// 步骤参数传递
Object result = new TaskWrapper("task1")
    // 添加执行步骤1
    .step((input, step) -> {
        step.info("执行 step{} ... ", step.num);
        return input + "xxx";
    })
    // 添加执行步骤2
    .step((input, step) -> {
        step.info("执行 step{} ... ", step.num);
        return input + "ooo";
    })
    // 可继续添加更多步骤
    .run("谁在");

System.out.println(result); // 谁在xxxooo

重复执行步骤任务

Object result = new TaskWrapper()
    // 添加可重复执行步骤
    .reStep(5, (input, step) -> {
        step.info("执行重试step{}, 第 {} 次", step.num, step.times());
        return new Random().nextInt(10) % 2 == 0 ? null : input + " end";
    }, (v, step) -> { // 返回 true 则重复继续执行当前步骤
        return v == null;
    })
    .run("xxx");

System.out.println(result); // xxx end

任务暂停/恢复

主动暂停

TaskWrapper task = new TaskWrapper()
    // 添加执行步骤1
    .step(step -> {
        step.info("执行 step1");
        step.task().suspend(); // 暂停下一个步骤执行
        return "xxx";
    })
    // 添加执行步骤2
    .step((param, step) -> {
        step.debug("执行 step2, 参数: " + param); // param 为xxx
    });
task.run(); // 开始执行
Thread.sleep(1000L * 5);
task.resume(); // 恢复执行

条件步骤

new TaskWrapper()
        // 添加执行步骤1
        .step(step -> {
            step.info("执行 step{}", step.num);
            return new Random().nextInt(10) % 2 == 0 ? "xxx" : "ooo";
        })
        // 条件步骤
        .step((input, step) -> {
            step.info("执行 step{} ... ", step.num);
        }, (input, step) -> Objects.equals(input, "xxx")) // 当前步骤执行的条件判断函数
        .run(); 

任务编排

一个大任务被拆分为多个小任务时

一组相关任务(执行上下文/任务调度/执行容器), 可编排复杂任务执行顺序规则

可控制任务并发数

当容器中两个队列(正在执行队列,等待执行队列)都为空并且是非暂停状态时, 容器自动结束

多个执行单元的串行请求

输入图片说明

new TaskContext("ctx")
    .addTask(new TaskWrapper("A").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("B")))
    .start();

多个执行单元的并行请求

输入图片说明

new TaskContext("ctx")
    .addTask(new TaskWrapper("A").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .start();

阻塞等待,串行的后面跟多个并行

输入图片说明

new TaskContext("ctx")
    .addTask(new TaskWrapper("A").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .start();

阻塞等待,多个并行的执行完毕后才执行某个

输入图片说明

new TaskContext("ctx")
    .addTask(new TaskWrapper("A").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("B") && step.ctx().taskSuccess("C")))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .start();

串并行相互依赖

输入图片说明

new TaskContext("ctx")
    .addTask(new TaskWrapper("A").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("D").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("B")))
    .addTask(new TaskWrapper("E").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("C")))
    .addTask(new TaskWrapper("F").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("D") && step.ctx().taskSuccess("E")))
    .start();

复杂场景

输入图片说明

new TaskContext("ctx2")
    .addTask(new TaskWrapper("A", step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("B").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("C").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("A")))
    .addTask(new TaskWrapper("F").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("B") && step.ctx().taskSuccess("B")))
    .addTask(new TaskWrapper("D", step -> {
        step.info("执行任务: {}", step.task().key);
    }))
    .addTask(new TaskWrapper("E").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("D")))
    .addTask(new TaskWrapper("G").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("E")))
    .addTask(new TaskWrapper("H").step(step -> {
        step.info("执行任务: {}", step.task().key);
    }, step -> step.ctx().taskSuccess("F") && step.ctx().taskSuccess("G")))
    .start();

衍生任务管理

new TaskContext() //创建任务容器
    // 添加task1
    .addTask(new TaskWrapper("task1"))
    // 添加task2
    .addTask(new TaskWrapper("task2"))
    // 添加任务3: 在任务中衍生任务task4
    .addTask(new TaskWrapper("task3").step(step -> {
        step.info("执行");
        step.ctx().addTask(new TaskWrapper("task4").step(step1 -> {
            step1.info("执行衍生任务");
        }));
    }))
    .start();

1.1.1 ing...

参与贡献

xnatural@msn.cn

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简介

轻量级任务(task)编排执行管理 展开 收起
Java
Apache-2.0
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