Log Context

Log context is very useful during rules engine code development. You can print regular debugging information into the platform admin UI's rules console for visual inspection
Context Variable: log

API Interface

void info(String msg);

void info(String format, Object... args);

void info(Throwable e);

void trace(Throwable e);

void trace(String format, Object... args);

void trace(String msg);

void debug(Throwable e);

void debug(String format, Object... args);

void debug(String msg);

void error(Throwable e);

void error(String msg);

void error(String format, Object... args);

void warn(String format, Object... args);

void warn(Throwable e);

void warn(String msg);

If you want to persist the log messages for later viewing, you can use the below functions

//Insert a failure message
void insert(String message);

//Insert a failure exception
void insert(Throwable cause);

//Insert a failure message with dynamic arguments
void insert(String format, Object... args);

Example

if(msg.humidity > 45){
  log.warn("Humidity :> %d", msg.humidity);
}

try{
  //Processing something
}catch(Exception ex){
  log.error(ex);
}