package com.fasterxml.storemate.backend.leveldb;
import java.io.File;
import com.fasterxml.storemate.store.backend.StoreBackendConfig;
import org.skife.config.DataAmount;
/**
* Simple configuration class for LevelDB - based backend.
*/
public class LevelDBConfig extends StoreBackendConfig
{
/*
/**********************************************************************
/* Simple config properties, paths
/**********************************************************************
*/
/**
* Name of root directory (using relative or absolute path) in which
* data directions will be created (one for main DB, another for
* last-modified index DB)
*<p>
* Should not be same as the directory in which data files are stored
* (nor the main deployment directory)
*/
public File dataRoot;
/**
* Additional slash-separated path for storing "node state" under
* Store metadata directory (which comes from main service config)
*/
public String nodeStateDir = "nodes";
/**
* Additional slash-separated path for storing optional "remote node state" information
* under Store metadata directory (which comes from main service config).
* Note that unlike with other stores, additional sub-directory is typically
* created under this directory, to support creation of multiple separate stores
* if/as needed.
*/
public String remoteStateDir = "remoteNodes";
/*
/**********************************************************************
/* Simple config properties, size thresholds
/**********************************************************************
*/
/**
* Size of main data cache, in bytes. Should be big enough to allow branches
* to be kept in memory, but not necessarily the whole DB.
*<p>
* Default value is 50 megs.
*/
public DataAmount dataCacheSize = new DataAmount("50MB");
/**
* Size of cache for last-modified index. Should typically be smaller than
* the main cache.
*<p>
* Default value is 20 megs.
*/
public DataAmount indexCacheSize = new DataAmount("20MB");
/*
/**********************************************************************
/* Construction
/**********************************************************************
*/
public LevelDBConfig() { }
public LevelDBConfig(File dataRoot) {
this(dataRoot, -1L, -1L);
}
public LevelDBConfig(File dataRoot, DataAmount dataCacheSize, DataAmount indexCacheSize) {
this.dataRoot = dataRoot;
if (dataCacheSize != null) {
this.dataCacheSize = dataCacheSize;
}
if (indexCacheSize != null) {
this.indexCacheSize = indexCacheSize;
}
}
public LevelDBConfig(File dataRoot, long dataCacheSizeInBytes, long indexCacheSizeInBytes) {
this.dataRoot = dataRoot;
if (dataCacheSizeInBytes > 0L) {
dataCacheSize = new DataAmount(dataCacheSizeInBytes);
}
if (indexCacheSizeInBytes > 0L) {
indexCacheSize = new DataAmount(indexCacheSizeInBytes);
}
}
/*
/**********************************************************************
/* Convenience stuff for overriding
/**********************************************************************
*/
public LevelDBConfig overrideDataCacheSize(long cacheSizeInBytes) {
dataCacheSize = new DataAmount(cacheSizeInBytes);
return this;
}
public LevelDBConfig overrideIndexCacheSize(long cacheSizeInBytes) {
indexCacheSize = new DataAmount(cacheSizeInBytes);
return this;
}
public LevelDBConfig overrideDataCacheSize(String cacheSizeDesc) {
dataCacheSize = new DataAmount(cacheSizeDesc);
return this;
}
public LevelDBConfig overrideIndexCacheSize(String cacheSizeDesc) {
indexCacheSize = new DataAmount(cacheSizeDesc);
return this;
}
}