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Chapter 25. File
Read and write files.
25.1. What’s inside
-
File component, URI syntax:
file:directoryName
Please refer to the above link for usage and configuration details.
25.2. Maven coordinates
Create a new project with this extension on code.quarkus.redhat.com
Or add the coordinates to your existing project:
<dependency>
<groupId>org.apache.camel.quarkus</groupId>
<artifactId>camel-quarkus-file</artifactId>
</dependency>
<dependency>
<groupId>org.apache.camel.quarkus</groupId>
<artifactId>camel-quarkus-file</artifactId>
</dependency>25.3. Additional Camel Quarkus configuration
25.3.1. Having only a single consumer in a cluster consuming from a given endpoint
When the same route is deployed on multiple JVMs, it could be interesting to use this extension in conjunction with the Master one. In such a setup, a single consumer will be active at a time across the whole camel master namespace.
For instance, having the route below deployed on multiple JVMs:
from("master:ns:timer:test?period=100").log("Timer invoked on a single JVM at a time");
from("master:ns:timer:test?period=100").log("Timer invoked on a single JVM at a time");It’s possible to enable the file cluster service with a property like below:
quarkus.camel.cluster.file.enabled = true quarkus.camel.cluster.file-root = target/cluster-folder-where-lock-file-will-be-held
quarkus.camel.cluster.file.enabled = true
quarkus.camel.cluster.file-root = target/cluster-folder-where-lock-file-will-be-held
As a result, a single consumer will be active across the ns camel master namespace. It means that, at a given time, only a single timer will generate exchanges across all JVMs. In other words, messages will be logged every 100ms on a single JVM at a time.
The file cluster service could further be tuned by tweaking quarkus.camel.cluster.file.* properties.
| Configuration property | Type | Default |
|---|---|---|
|
Whether a File Lock Cluster Service should be automatically configured according to 'quarkus.camel.cluster.file.*' configurations. |
|
|
|
The cluster service ID (defaults to null). |
| |
|
The root path (defaults to null). |
| |
|
The service lookup order/priority (defaults to 2147482647). |
| |
|
The time to wait before starting to try to acquire lock (defaults to 1000ms). |
| |
|
The time to wait between attempts to try to acquire lock (defaults to 10000ms). |
| |
|
The custom attributes associated to the service (defaults to empty map). |
|
Configuration property fixed at build time. All other configuration properties are overridable at runtime.
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