com.addthis.muxy

Class ReadMuxFileDirectoryCache

java.lang.Object

com.addthis.muxy.ReadMuxFileDirectoryCache

public class ReadMuxFileDirectoryCache
extends Object

Read Only Version of MFS. Uses a guava cache. This is primarily to help with concurrency issues. In particular, we do not want to hold a lock on the whole cache while inflating a muxy directory. That involves disk i/o and can easily block when multiple threads are trying to open a lot of directories (as often happens with eg. meshy).

Constructor Summary

Constructors

Constructor and Description
ReadMuxFileDirectoryCache()

Method Summary

Modifier and Type	Method and Description
static int	getCacheDirSize()
static int	getCacheFileSize()
static int	getCacheStreamSize()
static MuxFile	getFileMeta(File dir, String name)
static Collection<MuxFile>	listFiles(File dir)
static InputStream	readFile(File dir, String name, long offset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReadMuxFileDirectoryCache

public ReadMuxFileDirectoryCache()

Method Detail

getCacheDirSize

public static int getCacheDirSize()

getCacheStreamSize

public static int getCacheStreamSize()

getCacheFileSize

public static int getCacheFileSize()

listFiles

public static Collection<MuxFile> listFiles(File dir)
                                     throws Exception

Throws:

Exception

getFileMeta

public static MuxFile getFileMeta(File dir,
                                  String name)
                           throws Exception

Throws:

Exception

readFile

public static InputStream readFile(File dir,
                                   String name,
                                   long offset)
                            throws Exception

Throws:

Exception