# Activity Nodes

**Activity Nodes** represent the **core execution units** in a business process.\
Each Activity Node performs a specific task based on its defined functionality and is modeled using **BPMN standards** within the Process Template Diagram.

In ONEWEB Process Designer, different types of Activity Nodes are provided to support **human interaction**, **system execution**, **data processing**, and **integration**.

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### Types of Activity Nodes

Below are the available Activity Nodes and their purposes.

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#### Human Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FGTuABo1y8setpDiUEoH6%2F0?alt=media" alt=""><figcaption></figcaption></figure>

The **Human Task** is used to assign work to:

* A specific user
* A group of users
* A role‑based Work Party

It is typically used for approval steps, reviews, or any task requiring manual user interaction.

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#### Java Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FpOWhUxz1ZA7LUX0fETr7%2F1?alt=media" alt=""><figcaption></figcaption></figure>

The **Java Task** is used to execute **custom Java logic**.\
It invokes Java methods from uploaded Java libraries, allowing implementation of complex business logic or system‑specific processing.

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#### Database Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FqUP6bvTCcmcBpukCAsCP%2F2?alt=media" alt=""><figcaption></figcaption></figure>

The **Database Task** executes SQL operations, including:

* SELECT
* INSERT
* UPDATE
* DELETE

It is used to interact with data stored in relational databases as part of the process flow.

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#### File Read Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FA7SFFBovh8ZKmBjKb2Nc%2F3?alt=media" alt=""><figcaption></figcaption></figure>

The **File Read Task** reads data from external files.

Supported file formats:

* XML
* Excel
* Fixed Width
* Delimiter‑based files

This node is commonly used for batch processing or external data ingestion.

***

#### Web Service Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2F7ggZYXK9HDNCf89RMoR2%2F4?alt=media" alt=""><figcaption></figcaption></figure>

The **Web Service Task** is used to call external services, including:

* SOAP Web Services
* REST APIs

It enables integration with external systems and services.

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#### Sub Process Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FLk5YVp8AbPhjPpzpH8S6%2F5?alt=media" alt=""><figcaption></figcaption></figure>

The **Sub Process Task** invokes another process within the **same project**.\
It supports modular process design and reuse of common workflows.

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#### File Write Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FFbROnICSQ3yGxsrmsnSw%2F6?alt=media" alt=""><figcaption></figcaption></figure>

The **File Write Task** writes data to external files.

Supported formats are the same as File Read:

* XML
* Excel
* Fixed Width
* Delimiter‑based files

This node is typically used for exporting process data.

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#### Push Notification Task

<figure><img src="https://2015371994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FMpDjHWFRUtZ5nJcSfVXd%2Fuploads%2FMeO1ldGOTh3q6xpszFuq%2F7?alt=media" alt=""><figcaption></figcaption></figure>

The **Push Notification Task** sends notifications to **mobile applications**.\
It is commonly used to notify users about task assignments, approvals, or process status updates.

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### Summary

Activity Nodes define **what happens** within a process flow.

Key points:

* Each Activity Node serves a specific execution purpose
* Nodes support manual tasks, automation, integration, and data processing
* Activity Nodes are the building blocks of BPMN‑based process design
* Proper selection of node type ensures clear, maintainable workflows


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