LogService (Power TAC server main 1.7.0 API)

java.lang.Object
- org.powertac.server.LogService

```
@Service
public class LogService
extends Object
```
Support for per-game logging. Two logs are generated: a trace log, and a state log. The trace log is called "hhhxxx.trace" where hhh is the prefix provided as the argument to setPrefix(), and xxx is the id if the Competition instance. Ideally, hhh is the hostname of the machine running the sim.
The contents of the trace are intended to be error, warn, info, or debug messages that help developers or users understand what the server is doing. Loggers are named after the classes in which they are generated. Each class that will use a logger must include a statement
```
  static private Logger log = Logger.getLogger(ClassName.class.getName());
 
```
where ClassName is the name of the class.

The state log is a record of state changes, intended to allow complete reconstruction of a simulation. You get one with the statement
```
  static private Logger stateLog = Logger.getLogger("State");
 
```
Entries in the state log are of the form
```
  type:class:id:op:arg1:...
 
```
where type is one of [c,u,d] for create, update, delete; id is the identifier of the object, op (used only for update) is the operation, and the args are the arguments for that operation. The logger format will prepend the current offset from the beginning of the simulation in milliseconds.
Author:

John Collins

Constructor Summary

Constructors
Constructor Description

LogService()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getPrefix()`
`org.apache.logging.log4j.Logger`	`getStateLogger()`
`void`	`setPrefix(String prefix)`	Sets the filename prefix.
`void`	`startLog()`
`void`	`startLog(String id)`
`void`	`stopLog()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- LogService
```
public LogService()
```

Method Detail

setPrefix
```
public void setPrefix(String prefix)
```
Sets the filename prefix. This should be set to the hostname or some other distinguishing value.

getPrefix
```
public String getPrefix()
```

getStateLogger

public org.apache.logging.log4j.Logger getStateLogger()

startLog
```
public void startLog()
```

startLog
```
public void startLog(String id)
```

stopLog
```
public void stopLog()
```