LogState

java.lang.Object
- org.objectweb.howl.log.LogState

```
class LogState
extends java.lang.Object
```
Manage state variables for the Logger instance.
state variables are saved when logger is closed.
when a logger is open, a lock file is created to record the fact that a logger is active. Whe the logger is closed, the lock file is deleted. If the system or JVM crashes before the logger is closed, the lock file will serve to notify future users of the log that recovery may be necessary.

Field Summary

Fields
Modifier and Type Field Description

(package private) java.io.File lockFile

(package private) java.util.Properties state

(package private) java.io.File stateFile

Constructor Summary

Constructors
Constructor Description

LogState()
Construct LogState instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) void`	`load()`	loads state variables from property file.
`(package private) void`	`lock()`	make state unavailable whil log is open.
`(package private) void`	`save()`	saves state variables to property file.

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

- Field Detail
  - state
```
java.util.Properties state
```
  - lockFile
```
java.io.File lockFile
```
  - stateFile
```
java.io.File stateFile
```
- Constructor Detail
  - LogState
```
LogState()
```
    Construct LogState instance.
- Method Detail
  - load
```
void load()
```
    loads state variables from property file.
  - save
```
void save()
```
    saves state variables to property file.
  - lock
```
void lock()
```
    make state unavailable whil log is open.
    Locking the state is accomplished by creating a ".lock" file. Presence of the lock file indicates that an instance of the logger is currently open, or that a previous instance failed to close properly, perhaps due to system or JVM failure.