Thread Pool Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Error Handler Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 6.2.9 Job Properties Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 7.3 Error Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 7.4 Job Class Open Ecosystem – Unify job api for extension – Support rich job type lib, such as dataflow, script, HTTP, file, big data – Focus business SDK, can work with Spring IOC • Admin Console – Job administration

(TODO) – 基于有向无环图（DAG）的作业间依赖 – 基于有向无环图（DAG）的作业分片间依赖 • 作业开放生态 – 可扩展的作业类型统一接口 – 丰富的作业类型库，如数据流、脚本、HTTP、文件、大数据等 – 易于对接业务作业，能够与 Spring 依赖注入无缝整合 • 可视化管控端 – 作业管控端 – 作业执行历史数据追踪 – 注册中心管理 3 3 环境要求 3 ElasticJob 提供了对作业的弹性伸缩、分布式治理等功能的同时，并未限定作业的类型。它通过灵活的作 业 API，将作业解耦为作业接口和执行器接口。用户可以定制化全新的作业类型，诸如脚本执行、HTTP 服务执行（3.0.0‐beta 提供）、大数据类作业、文件类作业等。目前 ElasticJob 内置了简单作业、数据流作 业和脚本执行作业，并且完全开放了扩展接口，开发者可以通过 SPI 的方式引入新的作业类型，并且可以 务逻辑。典型代表：Simple 类 型、Dataflow 类型。Type 类型的作业只需提供类型名称即可，开发者无需实现该作业接口，而是通过外 置配置的方式使用。典型代表：Script 类型、HTTP 类型。 5.5. 作业开放生态 20 Apache ShardingSphere ElasticJob document 5.5.2 执行器接口 用于执行用户定义的作业接口，通过 Java

........................................................1730 49. Writing A Procedural Language Handler .......................................................................1732 50. Writing A Foreign by adding new • data types • functions • operators • aggregate functions • index methods 1. http://db.cs.berkeley.edu/postgres.html lviii Preface • procedural languages And because of the liberal burden, the Berkeley POSTGRES project officially ended with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lix Preface 2.2. Postgres95 In

........................................................1843 49. Writing A Procedural Language Handler ..............................................................................1845 50. Writing A PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://db.cs.berkeley.edu/postgres.html lxii Preface • functions • operators • aggregate functions and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lxiii Preface devoted to database

........................................................2049 52. Writing A Procedural Language Handler ..............................................................................2051 53. Writing A PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://db.cs.berkeley.edu/postgres.html xlv Preface • functions • operators • aggregate functions and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xlvi Preface devoted to database

........................................................1929 52. Writing A Procedural Language Handler .......................................................................1931 53. Writing A Foreign by adding new • data types • functions • operators • aggregate functions • index methods 1. http://db.cs.berkeley.edu/postgres.html xlii Preface • procedural languages And because of the liberal burden, the Berkeley POSTGRES project officially ended with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html xliii Preface 2.2. Postgres95 In

........................................................1791 49. Writing A Procedural Language Handler .......................................................................1793 50. Writing A Foreign by adding new • data types • functions • operators • aggregate functions • index methods 1. http://db.cs.berkeley.edu/postgres.html lxi Preface • procedural languages And because of the liberal burden, the Berkeley POSTGRES project officially ended with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lxii Preface 2.2. Postgres95 In

........................................................1911 49. Writing A Procedural Language Handler ..............................................................................1913 50. Writing A PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://db.cs.berkeley.edu/postgres.html lxv Preface • functions • operators • aggregate functions and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lxvi Preface devoted to database

........................................................1862 51. Writing A Procedural Language Handler .......................................................................1864 xxx 52. Writing A Foreign by adding new • data types • functions • operators • aggregate functions • index methods 1. http://db.cs.berkeley.edu/postgres.html lxiv Preface • procedural languages And because of the liberal burden, the Berkeley POSTGRES project officially ended with Version 4.2. 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lxv Preface 2.2. Postgres95 In

........................................................1979 51. Writing A Procedural Language Handler ..............................................................................1981 52. Writing A PostgreSQL can be extended by the user in many ways, for example by adding new • data types 1. http://db.cs.berkeley.edu/postgres.html lxix Preface • functions • operators • aggregate functions and support was taking up large amounts of time that should have been 2. http://www.informix.com/ 3. http://www.ibm.com/ 4. http://meteora.ucsd.edu/s2k/s2k_home.html lxx Preface devoted to database