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Logging and Debugging

The following methods provide logging of requests and responses:

RestClient.Builderlogger(Logger)logToConsole()logRequests(DetailLevel,Level,BiPredicate)

The following example shows the results of logging all requests that end with /bean.

Examples
// A simple bean we're going to round-trip.
MyBean bean = new MyBean();

bean = RestClient
    .create()
    .json5()
    .logRequests(DetailLevel.FULL, Level.SEVERE, (req,res)->req.getUri().endsWith("/bean"))
    .logToConsole()
    .build()
    .post("http://localhost/bean", bean)
    .run()
    .getContent().as(MyBean.class);

This produces the following console output:

=== HTTP Call (outgoing) ======================================================
=== REQUEST ===
POST http://localhost/bean
---request headers---
    Accept: application/json5
---request entity---
Content-Type: application/json5
---request content---
{f:1}
=== RESPONSE ===
HTTP/1.1 200
---response headers---
    Content-Type: application/json
---response content---
{f:1}
=== END =======================================================================",

It should be noted that if you enable request logging detail level DetailLevel.FULL, response bodies will be cached by default which may introduce a performance penalty. Additionally, the following method is also provided for enabling debug mode:

RestClient.Builderdebug()

Enabling debug mode has the following effects: