LockingReaderWriter

java.lang.Object
- net.adoptopenjdk.icedteaweb.lockingfile.LockingReaderWriter

Direct Known Subclasses:

UnsignedAppletActionStorageImpl
```
public abstract class LockingReaderWriter
extends java.lang.Object
```
Process-locked string storage backed by a file. Each string is stored on its own line. Any new-lines must be encoded somehow if they are to be stored.

Field Summary

Fields
Modifier and Type Field Description

private LockableFile lockableFile

Constructor Summary

Constructors
Constructor Description

LockingReaderWriter(java.io.File file)
Create locking file-backed storage.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`doLocked(java.lang.Runnable r)`
`java.io.File`	`getBackingFile()`	Get the underlying file.
`boolean`	`isReadOnly()`
`void`	`lock()`	Lock the underlying storage.
`protected void`	`readContents()`	Reads contents from file.
`protected abstract void`	`readLine(java.lang.String line)`
`void`	`unlock()`	Unlock the underlying storage.
`protected abstract void`	`writeContent(java.io.BufferedWriter writer)`
`protected void`	`writeContents()`	Writes stored contents to file.
`protected void`	`writeContentsLocked()`	Write contents to the file, first acquiring a lock.

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

Field Detail

lockableFile

private final LockableFile lockableFile

Constructor Detail
- LockingReaderWriter
```
public LockingReaderWriter(java.io.File file)
```
  Create locking file-backed storage.
  
  Parameters:
  
  file - the storage file

Method Detail

getBackingFile
```
public java.io.File getBackingFile()
```
Get the underlying file. Any access to this file should use lock() and unlock().

Returns:

the file

isReadOnly
```
public boolean isReadOnly()
```

lock
```
public void lock()
```
Lock the underlying storage. Lock is reentrant.

unlock
```
public void unlock()
```
Unlock the underlying storage. Lock is reentrant.

writeContents
```
protected void writeContents()
                      throws java.io.IOException
```
Writes stored contents to file. Assumes lock is held.

Throws:

java.io.IOException

readContents
```
protected void readContents()
                     throws java.io.IOException
```
Reads contents from file. Assumes lock is held.

Throws:

java.io.IOException

writeContentsLocked
```
protected void writeContentsLocked()
                            throws java.io.IOException
```
Write contents to the file, first acquiring a lock.

Throws:

java.io.IOException

doLocked

protected void doLocked(java.lang.Runnable r)

writeContent

protected abstract void writeContent(java.io.BufferedWriter writer)
                              throws java.io.IOException

Throws:: java.io.IOException

readLine

protected abstract void readLine(java.lang.String line)