2017-01-25 20:37 GMT+01:00 Tim Cronin <[email protected]>:
> still playing around with the jcache impl (see attached)
>
> I created the cache using jcache functionality but if I try to access it
> via native jcs it shows the cache as empty.
>
>
Right, we isolate managers to avoid issues (the singleton pattern taking a
default instance and not the one you get through JCache for instance).
> so you're are unable to manage the caches via JCSAdmin.
>
>
true and false (depend what JCSAdmin references there)
you can use JCSAdminBean (JMX MBean) to administrate your cache (or expose
it through HTTP through jolokia), there is one per manager instance
registered with a different name
the servlet will obvious not work since it uses the default instance
> but could have something misconfigured
>
>
> public final class CacheImpl {
>
> /**
> * Document Me!!!
> * @param args
> */
> public static void main(String[] args) {
> JCSCachingProvider provider = new JCSCachingProvider();
> Properties props = new Properties();
>
> CacheManager cacheMgr = new JCSCachingManager(provider,
> URI.create("file:///C:/Users/Tim/workspace/Jcache/conf/
> cache.ccf"),
> Thread.currentThread().getContextClassLoader(),
> props);
>
> JCSConfiguration<String, String> configuration = new
> JCSConfiguration<>(new MutableConfiguration(), String.class, String.class);
>
> Cache<String, String> testCache = cacheMgr.createCache("test",
> configuration);
>
> for(int cnt = 0; cnt < 200; cnt++) {
> testCache.put("key-" + cnt, "value-" + cnt);
> }
>
> for(int cnt = 0; cnt < 200; cnt++) {
> if(testCache.containsKey("key-" + cnt)) {
> System.out.println("hit key-" + cnt);
> } else {
> System.out.println("miss key-" + cnt);
> }
> }
>
> dumpJCache(testCache);
> dumpJCS("test");
>
> cacheMgr.close();
> }
>
> private static void dumpJCache(Cache<String, String> cache) {
> StringBuilder buff = new StringBuilder();
> try {
> buff.append("jcache: ").append(cache.getName()).append("
> closed ").append(cache.isClosed()).append('\n');
>
> Iterator<Cache.Entry<String, String>> i = cache.iterator();
>
> while(i.hasNext()){
> Cache.Entry<String, String> entry = i.next();
> buff.append("key[").append(entry.getKey()).append("]
> value[").append(entry.getValue()).append( "]\n");
> }
>
> } catch (Exception e) {
> StringWriter out = new StringWriter(512);
> e.printStackTrace(new PrintWriter(out));
> buff.append(out.toString());
> }
>
> System.out.println(buff.toString());
> }
>
> private static void dumpJCS(String cacheName) {
> StringBuilder buff = new StringBuilder();
> try {
> CacheAccess<String, String> cache = JCS.getInstance(cacheName);
>
> buff.append("jcs:
> ").append(cache.getCacheAttributes().getCacheName()).append("
> status ").append(cache.getStats()).append('\n');
>
> Set<String> keys = cache.getCacheControl().getKeySet();
>
> if(keys.isEmpty()) {
> } else {
> for(String key : cache.getCacheControl().getKeySet()){
> buff.append("key[").append(
> key).append("]value[").append(cache.get(key)).append( "]\n");
> }
> }
>
> } catch (Exception e) {
> StringWriter out = new StringWriter(512);
> e.printStackTrace(new PrintWriter(out));
> buff.append(out.toString());
> }
>
> System.out.println(buff.toString());
> }
>
> cache.ccf:
>
> ##################################################################
> # JCS cache configuration
> #
> # JCS homepage: https://commons.apache.org/proper/commons-jcs/
> ##################################################################
>
> ##################################################################
> # default mem cache settings
> ##################################################################
> jcs.default=DC
> jcs.default.cacheattributes=org.apache.commons.jcs.engine.
> CompositeCacheAttributes
> jcs.default.cacheattributes.MemoryCacheName=org.apache.
> commons.jcs.engine.memory.lru.LRUMemoryCache
> jcs.default.cacheattributes.UseMemoryShrinker=true
> jcs.default.cacheattributes.MaxMemoryIdleTimeSeconds=3600
> jcs.default.cacheattributes.ShrinkerIntervalSeconds=300
> jcs.default.cacheattributes.MaxSpoolPerRun=64
> jcs.default.cacheattributes.DiskUsagePatternName=UPDATE
>
> ##################################################################
> # default element attributes
> ##################################################################
> jcs.default.elementattributes=org.apache.commons.jcs.engine.
> ElementAttributes
> jcs.default.elementattributes.MaxLife=-1
> jcs.default.elementattributes.IdleTime=-1
> jcs.default.elementattributes.IsEternal=true
> jcs.default.elementattributes.IsSpool=true
> jcs.default.elementattributes.IsRemote=false
> jcs.default.elementattributes.IsLateral=false
>
> ##################################################################
> # default disk cache settings
> ##################################################################
> jcs.auxiliary.DC=org.apache.commons.jcs.auxiliary.disk.indexed.
> IndexedDiskCacheFactory
> jcs.auxiliary.DC.attributes=org.apache.commons.jcs.auxiliary.disk.indexed.
> IndexedDiskCacheAttributes
> jcs.auxiliary.DC.attributes.DiskPath=${user.home}/test-cache/
> jcs.auxiliary.DC.attributes.MaxPurgatorySize=512
> jcs.auxiliary.DC.attributes.MaxKeySize=8096
> jcs.auxiliary.DC.attributes.OptimizeAtRemoveCount=256
> jcs.auxiliary.DC.attributes.OptimizeOnShutdown=true
> jcs.auxiliary.DC.attributes.EventQueueType=POOLED
> jcs.auxiliary.DC.attributes.EventQueuePoolName=disk_cache_event_queue
>
> ##################################################################
> # Disk Cache pool
> ##################################################################
> thread_pool.disk_cache_event_queue.boundarySize=50
> thread_pool.disk_cache_event_queue.useBoundary=true
> thread_pool.disk_cache_event_queue.maximumPoolSize=30
> thread_pool.disk_cache_event_queue.minimumPoolSize=4
> thread_pool.disk_cache_event_queue.keepAliveTime=3500
> thread_pool.disk_cache_event_queue.startUpSize=4
> thread_pool.disk_cache_event_queue.whenBlockedPolicy=RUN
>
> ##################################################################
> # test
> ##################################################################
> jcs.region.test.cacheattributes.MaxObjects=100
> jcs.region.test.elementattributes.IsEternal=false
> jcs.region.test.elementattributes.MaxLife=2000000
> jcs.region.test.elementattributes.IdleTime=1800
>
>
>
> On Wed, Jan 25, 2017 at 8:48 AM, Tim Cronin <[email protected]>
> wrote:
>
>> I'm trying to leverage Spring caching using jcs cache
>> the javadocs show only ctor for the JCSCachingManager.
>> https://commons.apache.org/proper/commons-jcs/commons-jcs-
>> jcache/apidocs/src-html/org/apache/commons/jcs/jcache/JCSC
>> achingManager.html#line.83
>>
>> but i pass in what seems more like default values
>>
>> public static void main(String[] args) throws Exception
>> {
>> JCSCachingProvider provider = new JCSCachingProvider();
>> Properties props = new Properties();
>>
>> CacheManager cacheMgr = new JCSCachingManager(provider,
>> JCSCachingProvider.DEFAULT_URI,
>> Thread.currentThread().getContextClassLoader(),
>> props);
>>
>> //... do cache stuff...
>>
>> cacheMgr.close();
>>
>> }
>>
>> I'm trying to fit this into an existing webapp that uses xml base
>> configuration
>> and having to set the defaults seems problematic, I'd have to wrap it to
>> get
>> proper current class load or use system which doesn't map to webapp loader
>>
>> Is there any reason for not having a default Ctor?
>>
>> <!-- cjs cache manager setup -->
>> <beans:bean id="cache.provider" class="org.apache.commons.jcs.
>> jcache.JCSCachingProvider"/>
>> <beans:bean id="cache.url" class="org.apache.commons.jcs.
>> jcache.JCSCachingProvider.DEFAULT_URI"/>
>> <!-- this seems hacky should be a -->
>> <beans:bean id="cache.classloader" class="java.lang.Class"
>> factory-method="getSystemClassLoader" />
>> <beans:bean id="cache.properties" class="java.util.Properties"/>
>>
>> <beans:bean id="cache.manager" class="org.apache.commons.jcs.
>> jcache.JCSCachingManager">
>> <beans:constructor-arg ref="cache.provider" />
>> <beans:constructor-arg ref="cache.url" />
>> <beans:constructor-arg ref="cache.classloader" />
>> <beans:constructor-arg ref="cache.properties" />
>> </beans:bean>
>>
>>
>
>
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