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.
Creating a file-tail event receiver
For instructions on creating a file-tail event receiver, see Receiving Events.
Configuring adapter properties
Specify the Adapter Properties, when creating a file-tail event receiver using the management console as shown below.
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 Input 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.
<eventReceiver name="FileTailInputEventAdapter" statistics="disable" trace="disable" xmlns="http://wso2.org/carbon/eventreceiver">
<from eventAdapterType="file-tail">
<property name="filepath">/User/Desktop/abc.txt</property>
<property name="startFromEnd">true</property>
<property name="delayInMillis">10</property>
</from>
.............................
</eventReceiver>
The above adapter properties are described below.
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 |