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Generic Term | Specific Term | Meaning |
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Job | Jobs come in two flavors: Shell Jobs specify job scripts that are executed for an operating system shell, JVM Jobs specify use of a Java class, see JS7 - Job Templates. For both usages the Job defines what should be executed. At the point in time when a Job is started it is called a running Task, i.e. the instance of a Job. A Job specifies what is executed The smallest unit that be executed on a given machine, for example, from the command line (commands in a shell ) of the operating system. Jobs are stateless objects, the instance of a Job is called a Task.Jobs are available as Shell Jobs and they can run in a Java Virtual Machine as JVM Jobs, see JS7 - Job Templates Tasks are stateful objects that can be started, killed etc. For details see JS7 - Job Instruction. | |
Task | The instance of a Job that is executed. A Job can run in a number of parallel Tasks. | |
Process | The operating system view of a Task. In addition, Tasks can have child Processesprocesses. | |
Return Code | A summary term for the Exit Code of a Process and the Return Code provided by Jobs running in a JVM. | |
Exit Code | An Exit Code is returned by a terminating Process. This includes Exit Codes that are returned by shell Jobs. JVM Jobs do not return Exit Codes as their Tasks can be re-used. Instead, JVM Jobs complete with a Return Code. | |
Workflow | A Workflow is started by an Order that passes the Nodes and Instructions included with the Workflow. Any number of Orders can execute the same Workflow in parallel instances running independently of each other. The succession of Instructions in a Workflow implements a Workflow Pattern, for example a Sequence. However, the most simple Workflow Pattern can include execution of a single Job. Frequently used synonyms include the terms Job Net, Job Stream. For details see JS7 - Workflows. | |
Instruction | Instructions implement Workflow Patterns such as Fork/Join, a Sequence etc.. Instructions rule job dependencies, see JS7 - Workflow Instructions. | |
Node | The position of an Instruction, for example, for the execution of a Job in a Workflow. Nodes are assigned labels that allow recognition of steps in a Workflow. | |
Workflow Pattern | A number of Nodes that are implemented by Instructions in a Workflow. Instructions include, for example, execution of a Job or forking execution according to a Workflow Pattern. For details see JS7 - Workflow Patterns. | |
Sequence | A Workflow Pattern that implements sequential execution of Instructions in a Workflow. | |
Order | Orders represent triggers for execution of Workflows.
For details see JS7 - Orders. | |
Timed Order | Such Orders are automatically created by a Schedule that determines when to run the Order and what parameterization to be applied. | |
Ad hoc Order | Such Orders are added by users or from external applications on-the-fly. Schedules are not involved. | |
File Order | An Order that is represented by an incoming file, see JS7 - File Watching. | |
State | Orders are stateful objects that pass a number of State Transitions during their lifetime. States include, for example, being scheduled for later execution, waiting for resources, running, failed, etc. | |
State Transition | Orders are subject to State Transitions when moving from one State to the next. The JS7 implements a Finite-state Machine with non-deterministic transitions that can be considered a Directed Acyclic Graph. State Transitions are signaled by Events. For details see JS7 - Order State Transitions. | |
Event | Events signal State Transitions of Orders. They are used, for example, to automatically update information in the JOC Cockpit GUI about Orders running, waiting, having failed, etc. | |
File Order Source | The scheduling object that defines a source for File Orders, for example, the directory that should be watched for incoming files. For details see JS7 - File Watching. | |
Resource Lock | Resource Locks implement mutual exclusion and can be used to limit parallelism of Jobs. For details see JS7 - Resource Locks. | |
Job Resource | Job Resources are used to propagate variables and to inject environment variables to shell Jobs. They are a flexible means for parameterizing Workflows and Jobs. For details see JS7 - Job Resources. | |
Notice Board | Notice Boards implement job dependencies, for example, to make a Job wait for another Job in a different Workflow. For details see JS7 - Notice Boards. | |
Script Include | Script Includes are re-usable pieces of shell code that can be added to Job scripts. For details see JS7 - Script Includes. | |
Calendar | Calendars determine the days that are are considered by Schedules when creating Orders. For example, a business day Calendar can specify Monday to Friday as possible days for Workflow execution. A Schedule that is assigned this Calendar can further restrict execution to more specific days. For details see JS7 - Calendars. | |
Schedule | Schedules make use of Calendars that specify possible days for Workflow execution. Schedules can create Orders for any days of the assigned Calendar and they can further restrict the days on which Orders are created.:
For details see JS7 - Schedules. |
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