File-tail event receiver reads the tail of a given file and feeds that to the product engine. It only supports text input mapping type.
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Creating a file-tail event receiver
For instructions on creating a file-tail event receiver, see Receiving Events. Configuring Event Receivers .
Configuring global properties
The following global property can be set for the file-tail event receiver type in the <DAS_HOME>/repository/conf/input-event-adapters.xml file. This property applies to all the receivers of the file-tail type. If this property is removed from the file, its default value still applies.
| Property Key | Description | Data Type | Default Value |
|---|---|---|---|
events.duplicated.in.cluster | If this property is set to true, events received by file-tail receivers are re-created in every node in the cluster. | Boolean | false |
Configuring adapter properties
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After entering the above adapter properties, select the Event Stream to which you want to map the incoming events, and the Message Format which you want to apply on the receiving events . Also, click Advanced to define custom input mappings based on the Message Format you selected. For more information on custom input mapping types, see Receiving Events in Various Event FormatsInput Mapping Types . |
You can also d efine the respective adapter properties of the event receiver based on the transport type within the <from> element of the event receiver configuration in the <PRODUCT_HOME>/repository/deployment/server/eventreceivers/ directory as follows.
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Adapter property | Description | Configuration file property | Example |
|---|---|---|---|
File path | Absolute path of the text file to read the data from. | filepath | /Users/User/Desktop/abc.txt |
Delay | The delay between checks for new content on file in milliseconds. | delayInMillis | 10 |
Start From End | Set to true to tail from the end of the file, false to tail from the beginning of the file. | startFromEnd | true |
Related samples
For more information on file-tail event receiver type, see the following samples in WSO2 CEP Documentation.