xdocs/JDBCDiskCache.xml (226 lines of code) (raw):
<?xml version="1.0"?>
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<document>
<properties>
<title>JDBC Disk Cache</title>
<author email="asmuts@apache.org">Aaron Smuts</author>
</properties>
<body>
<section name="JDBC Disk Auxiliary Cache">
<p> The JDBC disk cache uses a relational database such as MySQL as a
persistent store. It works with Oracle, MySQL and HSQL. The cache
elements are serialized and written into a BLOB. Multiple regions
can share a single table. You can define multiple, differently
configured JDBC disk caches in one JCS instance. This allows you to
use different tables for different cache regions.</p>
<p> If you want to use numerous JDBC disk cache instances that talk
to the same database, you can configure them to share a connection
pool. You might want to use several different tables to partition
the data. Some operations, such as index building on a MyISAM
storage engine take longer if there are more items in the table.</p>
<subsection name="Example #1 cache.ccf (MySQL)">
<source>
<![CDATA[
##############################################################
################## DEFAULT CACHE REGION #####################
# sets the default aux value for any non configured caches
jcs.default=MYSQL,RCluster
jcs.default.cacheattributes=org.apache.commons.jcs3.engine.CompositeCacheAttributes
jcs.default.cacheattributes.MaxObjects=5000
jcs.default.cacheattributes.MemoryCacheName=org.apache.commons.jcs3.engine.memory.lru.LRUMemoryCache
jcs.default.cacheattributes.UseMemoryShrinker=true
jcs.default.cacheattributes.MaxMemoryIdleTimeSeconds=7200
jcs.default.cacheattributes.ShrinkerIntervalSeconds=60
jcs.default.elementattributes=org.apache.commons.jcs3.engine.ElementAttributes
jcs.default.elementattributes.IsEternal=false
jcs.default.elementattributes.MaxLife=14400
jcs.default.elementattributes.IdleTime=14400
jcs.default.elementattributes.IsSpool=true
jcs.default.elementattributes.IsRemote=true
jcs.default.elementattributes.IsLateral=true
##############################################################
################## CACHE REGIONS AVAILABLE ###################
##############################################################
################## AUXILIARY CACHES AVAILABLE ################
# MYSQL disk cache used for flight options
jcs.auxiliary.MYSQL=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheFactory
jcs.auxiliary.MYSQL.attributes=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheAttributes
jcs.auxiliary.MYSQL.attributes.userName=myUsername
jcs.auxiliary.MYSQL.attributes.password=myPassword
jcs.auxiliary.MYSQL.attributes.url=jdbc:mysql://localhost:3306/YOURDBNAME?autoReconnect=true
jcs.auxiliary.MYSQL.attributes.driverClassName=com.mysql.jdbc.Driver
jcs.auxiliary.MYSQL.attributes.tableName=JCS_STORE
jcs.auxiliary.MYSQL.attributes.testBeforeInsert=false
jcs.auxiliary.MYSQL.attributes.maxActive=100
jcs.auxiliary.MYSQL.attributes.MaxPurgatorySize=10000000
jcs.auxiliary.MYSQL.attributes.UseDiskShrinker=true
jcs.auxiliary.MYSQL.attributes.ShrinkerInterval=1800
jcs.auxiliary.MYSQL.attributes.allowRemoveAll=false
jcs.auxiliary.MYSQL.attributes.EventQueueType=POOLED
jcs.auxiliary.MYSQL.attributes.EventQueuePoolName=disk_cache_event_queue
##############################################################
################## OPTIONAL THREAD POOL CONFIGURATION #########
# Disk Cache pool
thread_pool.disk_cache_event_queue.useBoundary=true
thread_pool.disk_cache_event_queue.boundarySize=1000
thread_pool.disk_cache_event_queue.maximumPoolSize=50
thread_pool.disk_cache_event_queue.minimumPoolSize=10
thread_pool.disk_cache_event_queue.keepAliveTime=3500
thread_pool.disk_cache_event_queue.whenBlockedPolicy=RUN
thread_pool.disk_cache_event_queue.startUpSize=10
]]>
</source>
</subsection>
<subsection name="Example #2 cache.ccf (MySQL)">
<p>
This example uses two JDBC Disk Cache instances and a shared connection pool.
</p>
<source>
<![CDATA[
jcs.default=JDBC_0
jcs.default.cacheattributes=org.apache.commons.jcs3.engine.CompositeCacheAttributes
jcs.default.cacheattributes.MaxObjects=100
jcs.default.cacheattributes.MemoryCacheName=org.apache.commons.jcs3.engine.memory.lru.LRUMemoryCache
jcs.default.cacheattributes.UseMemoryShrinker=false
jcs.default.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.default.cacheattributes.ShrinkerIntervalSeconds=60
jcs.default.elementattributes=org.apache.commons.jcs3.engine.ElementAttributes
jcs.default.elementattributes.IsEternal=false
jcs.default.elementattributes.MaxLife=700
jcs.default.elementattributes.IdleTime=1800
jcs.default.elementattributes.IsSpool=true
jcs.default.elementattributes.IsRemote=true
jcs.default.elementattributes.IsLateral=true
# #############################################################
# ################# CONFIGURED REGIONS ########################
jcs.region.testCache1=JDBC_1
jcs.region.testCache1.cacheattributes.MaxObjects=10000
# #############################################################
# ################# AUXILIARY CACHES AVAILABLE ################
# JDBC disk cache
jcs.auxiliary.JDBC_0=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheFactory
jcs.auxiliary.JDBC_0.attributes=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheAttributes
jcs.auxiliary.JDBC_0.attributes.tableName=JCS_STORE_0
jcs.auxiliary.JDBC_0.attributes.testBeforeInsert=false
jcs.auxiliary.JDBC_0.attributes.allowRemoveAll=true
jcs.auxiliary.JDBC_0.attributes.MaxPurgatorySize=10000000
jcs.auxiliary.JDBC_0.attributes.connectionPoolName=MySharedPool
jcs.auxiliary.JDBC_0.attributes.EventQueueType=POOLED
jcs.auxiliary.JDBC_0.attributes.EventQueuePoolName=disk_cache_event_queue
jcs.auxiliary.JDBC_1=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheFactory
jcs.auxiliary.JDBC_1.attributes=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheAttributes
jcs.auxiliary.JDBC_1.attributes.tableName=JCS_STORE_1
jcs.auxiliary.JDBC_1.attributes.testBeforeInsert=false
jcs.auxiliary.JDBC_1.attributes.allowRemoveAll=true
jcs.auxiliary.JDBC_1.attributes.MaxPurgatorySize=10000000
jcs.auxiliary.JDBC_1.attributes.connectionPoolName=MySharedPool
jcs.auxiliary.JDBC_1.attributes.EventQueueType=POOLED
jcs.auxiliary.JDBC_1.attributes.EventQueuePoolName=disk_cache_event_queue
# #############################################################
# ######## OPTIONAL SHARED CONNECTION POOL CONFIGURATION ######
# My Shared Pool
jcs.jdbcconnectionpool.MySharedPool.attributes.userName=sa
jcs.jdbcconnectionpool.MySharedPool.attributes.password=
jcs.jdbcconnectionpool.MySharedPool.attributes.url=jdbc:hsqldb:target/cache_hsql_db
jcs.jdbcconnectionpool.MySharedPool.attributes.driverClassName=org.hsqldb.jdbcDriver
jcs.jdbcconnectionpool.MySharedPool.attributes.maxActive=15
# #############################################################
# ################# OPTIONAL THREAD POOL CONFIGURATION #########
# Disk Cache pool
thread_pool.disk_cache_event_queue.useBoundary=false
thread_pool.disk_cache_event_queue.boundarySize=500
thread_pool.disk_cache_event_queue.maximumPoolSize=15
thread_pool.disk_cache_event_queue.minimumPoolSize=10
thread_pool.disk_cache_event_queue.keepAliveTime=3500
thread_pool.disk_cache_event_queue.whenBlockedPolicy=RUN
thread_pool.disk_cache_event_queue.startUpSize=10
]]>
</source>
</subsection>
<subsection name="Example #3 cache.ccf (JNDI)">
<p>
This example uses the two JDBC Disk Cache instances from the example above and a JNDI data source.
</p>
<source>
<![CDATA[
jcs.default=JDBC_0
jcs.default.cacheattributes=org.apache.commons.jcs3.engine.CompositeCacheAttributes
jcs.default.cacheattributes.MaxObjects=100
jcs.default.cacheattributes.MemoryCacheName=org.apache.commons.jcs3.engine.memory.lru.LRUMemoryCache
jcs.default.cacheattributes.UseMemoryShrinker=false
jcs.default.cacheattributes.MaxMemoryIdleTimeSeconds=3600
jcs.default.cacheattributes.ShrinkerIntervalSeconds=60
jcs.default.elementattributes=org.apache.commons.jcs3.engine.ElementAttributes
jcs.default.elementattributes.IsEternal=false
jcs.default.elementattributes.MaxLife=700
jcs.default.elementattributes.IdleTime=1800
jcs.default.elementattributes.IsSpool=true
jcs.default.elementattributes.IsRemote=true
jcs.default.elementattributes.IsLateral=true
# #############################################################
# ################# CONFIGURED REGIONS ########################
jcs.region.testCache1=JDBC_1
jcs.region.testCache1.cacheattributes.MaxObjects=10000
# #############################################################
# ################# AUXILIARY CACHES AVAILABLE ################
# JDBC disk cache
jcs.auxiliary.JDBC_0=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheFactory
jcs.auxiliary.JDBC_0.attributes=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheAttributes
jcs.auxiliary.JDBC_0.attributes.tableName=JCS_STORE_0
jcs.auxiliary.JDBC_0.attributes.testBeforeInsert=false
jcs.auxiliary.JDBC_0.attributes.allowRemoveAll=true
jcs.auxiliary.JDBC_0.attributes.MaxPurgatorySize=10000000
jcs.auxiliary.JDBC_0.attributes.connectionPoolName=JNDI
jcs.auxiliary.JDBC_0.attributes.EventQueueType=POOLED
jcs.auxiliary.JDBC_0.attributes.EventQueuePoolName=disk_cache_event_queue
jcs.auxiliary.JDBC_1=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheFactory
jcs.auxiliary.JDBC_1.attributes=org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCacheAttributes
jcs.auxiliary.JDBC_1.attributes.tableName=JCS_STORE_1
jcs.auxiliary.JDBC_1.attributes.testBeforeInsert=false
jcs.auxiliary.JDBC_1.attributes.allowRemoveAll=true
jcs.auxiliary.JDBC_1.attributes.MaxPurgatorySize=10000000
jcs.auxiliary.JDBC_1.attributes.connectionPoolName=JNDI
jcs.auxiliary.JDBC_1.attributes.EventQueueType=POOLED
jcs.auxiliary.JDBC_1.attributes.EventQueuePoolName=disk_cache_event_queue
# #############################################################
# ######## OPTIONAL JNDI CONNECTION POOL CONFIGURATION ######
# JNDI Pool
jcs.jdbcconnectionpool.JNDI.attributes.jndiPath=java:comp/env/jdbc/MyDB
jcs.jdbcconnectionpool.JNDI.attributes.jndiTTL=300000
# #############################################################
# ################# OPTIONAL THREAD POOL CONFIGURATION #########
# Disk Cache pool
thread_pool.disk_cache_event_queue.useBoundary=false
thread_pool.disk_cache_event_queue.boundarySize=500
thread_pool.disk_cache_event_queue.maximumPoolSize=15
thread_pool.disk_cache_event_queue.minimumPoolSize=10
thread_pool.disk_cache_event_queue.keepAliveTime=3500
thread_pool.disk_cache_event_queue.whenBlockedPolicy=RUN
thread_pool.disk_cache_event_queue.startUpSize=10
]]>
</source>
</subsection>
<subsection name="Table Creation Script (MySQL)">
<source>
<![CDATA[
drop TABLE JCS_STORE;
CREATE TABLE JCS_STORE
(
CACHE_KEY VARCHAR(250) NOT NULL,
REGION VARCHAR(250) NOT NULL,
ELEMENT BLOB,
CREATE_TIME DATETIME,
CREATE_TIME_SECONDS BIGINT,
MAX_LIFE_SECONDS BIGINT,
SYSTEM_EXPIRE_TIME_SECONDS BIGINT,
IS_ETERNAL CHAR(1),
PRIMARY KEY (CACHE_KEY, REGION)
);
alter table JCS_STORE MAX_ROWS = 10000000;
alter table JCS_STORE AVG_ROW_LENGTH = 2100;
create index JCS_STORE_DELETE_IDX on JCS_STORE (SYSTEM_EXPIRE_TIME_SECONDS,IS_ETERNAL,REGION);
]]>
</source>
</subsection>
</section>
</body>
</document>