Cache objects VO

Similar Questions

• Notification of memory: Cache object library loaded in SGA

  Hi all
  
  
  My OS: Solaris
  
  DB version: 10.2.0
  
  Today when I check one of the database alert log file, I get the message below
  
  Notification of memory: Cache object library loaded in SGA
  
  2607K heap size exceed the threshold of notification (2048K)
  
  
  I think it is the informational message and does not affect the database
  
  Please correct me if I'm wrong

  Vikas Kohli wrote:
  Hi all

  My OS: Solaris

  DB version: 10.2.0

  Today when I check one of the database alert log file, I get the message below

  Notification of memory: Cache object library loaded in SGA

  2607K heap size exceed the threshold of notification (2048K)

  I think it is the informational message and does not affect the database

  FIX.
  If/when you upgrade to a version fully supported, it will no longer appear.

• Loaded in the LMS library Cache object

  Hello
  10g R2 I have these in the alertlog:

  Memory Notification: Library Cache Object loaded into SGA
  Heap size 2143K exceeds notification threshold (2048K)

  Any explanation?
  
  Thank you.

  I happened to see this note only by accident :-)

  See MOS Note 330239.1

• Cache objects VI shared between 32 and 64 bit?

  Transferred into the LAVA: http://lavag.org/topic/16349-vi-object-cache-shared-between-32-and-64-bit/page__pid__99898

  I am currently working on a major project that is to be deployed in 32 - bit and 64-bit flavors. This means that I must periodically switch between installed versions of LV to build.

  It * seems * that if I work in 32-bit BT, and then I close and re-open my project in 64-bit BT, that everything needs to recompile... even if I had only changed a few things since the last, I worked in 64-bit.

  It seems that while LV keeps a Cache of objects VI separate for each version of LV, that it does NOT keep a cache separate for 32-bit versions and 64-bit. Is this really the case?

  Fabric Hello,

  LabVIEW maintain separate caches for versions 32-bit and 64-bit of the same version, but in the same file. They are separate entries in the objFileDB. Because 32-bit and 64-bit are very different beasts, the project must be recompiled in order to adapt to the new platform every time that you open in a new environment. It is possible to separate the compiled source code code. Research in the other forum posts, this separation likely to cause a higher risk of corruption VI.

  Best,

  tannerite

• is a cache server must have knowledge on cached objects

  Hi all:
  
  I worked on this configuration:
  
  1. a cache server, which is the instance of DefaultCacheServer consistency, with a certain configuration of twists and turns.
  2. a charger, which reads a csv (or other source of data later) file and generate a list of items pofobject implemented and put them in a card and then put the card in the cache;
  3. an auditor of reading, which is reading the NamedCache created previously and do some game: check the content, add filters, etc..
  
  Now it works fine, but I noticed a few things:
  
  -the server must have a pof-config file that contains the classes that implement the PortableObject, and as a result, these classes must be in the classpath of the server as well. If these conditions are not met, the charger will fail to load the objects into the cache.
  
  What is a ligitimate observation? I mean, the server needs to know the objects it cached? It seems to me that couple deeply the server and applications that use the server.
  
  In addition, I want to make objects more generic as possible. For example, if a client retrieves the result set from a SQL-based database, we are always trying to save the results cached somehow, even if we don't know about its internal information such as how that many columns or a column of names /types (maybe we can read this info from metadata?). However, we must know the properties of the object (name/type) to properly serialize / deserialize them before loading them in the cache.
  
  So there is a conflict and how would be solve it?
  
  Thank you
  John

  Johnny_hunter wrote:
  Thank you, Rob. your answer was helpful.

  Aruond my 2nd question, I don't know if it's feasible, but it is an interesting topic. Let me explain a little more.

  If a user enters a SQL statement, he or she would have the knowledge of the structure of the returned resultset object - the necessary information in the SQL, they created in the first place. However, how can we put the results set returned in the cache for later use? It is difficult, because the SQL code is arbitrary so the key is not clear and the result set is difficult to serialize.

  Even we can fill the cache with all the d-base tables, the SQL consistency is not semantically as powerful as real SQL for all tasks.

  On the other hand, if the user calls a store proc, we get lucky: Ms name is set, the parameters are editable, but put in shape. Once combined, we can use it as the name of a namedcache. For example, if we have a PC called sp_get_trades, and it takes a standing business as the param, we can create a name such as "sp_get_trade_2011_07_11". From the returned result set, we can obtain its metadata, which contains the column names and types, armed of a JAVA reflection API, we might be able to create a list of mobile objects.

  Hi John,.

  the result set can be serialized into a single object (no matter whether serialized with POF or not).

  This unique object can then be cached with an appropriate key. Typical approaches to the formation of such a key creates a composite key that contains the SQL query AND all the SQL parameter values in the order in which they are passed to the class PreparedStatement. Of course the key class must properly implement equals, hashcode, and must also be serializable with the same method (Java or POF Serialization) that is used for the cache service.

  Of course sooner or later, you can invalidate this cache entry, so you can specify a lifetime in putting the result in the cache.

  In addition, you can explicitly invalidate the cache on changes in DB entry, create an index on the SQL attribute in the key or a composite index on the SQL attribute and some settings or just an index on one or more parameters together, to allow you to send an input processor filtered by these indexed attributes, and given the knowledge about what has changed in the database.

  Best regards

  Robert

• Error in a replicated Cache object

  Hello
  I'm under a single node for consistency with replicated cache. But when I try to add an object to it, I get the exception below. However, I get this error while doing the same thing in a distributed cache. Can someone please tell me what I do wrong here.
  
  Caused by: java.io.IOException: readObject failed: java.lang.ClassNotFoundException: com.test.abc.pkg.RRSCachedObject
  in java.net.URLClassLoader$ 1.run(URLClassLoader.java:200)
  at java.security.AccessController.doPrivileged (Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
  at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
  at java.lang.Class.forName0 (Native Method)
  at java.lang.Class.forName(Class.java:242)
  at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:585)
  at com.tangosol.io.ResolvingObjectInputStream.resolveClass(ResolvingObjectInputStream.java:68)
  at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1544)
  at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1466)
  at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1699)
  at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
  at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
  at com.tangosol.util.ExternalizableHelper.readSerializable(ExternalizableHelper.java:2145)
  at com.tangosol.util.ExternalizableHelper.readObjectInternal(ExternalizableHelper.java:2276)
  at com.tangosol.util.ExternalizableHelper.deserializeInternal(ExternalizableHelper.java:2673)
  at com.tangosol.util.ExternalizableHelper.fromBinary(ExternalizableHelper.java:257)
  to com.tangosol.coherence.component.net.extend.proxy.CacheServiceProxy$ ConverterFromBinary.convert (CacheServiceProxy.CDB:4)
  to com.tangosol.util.ConverterCollections$ ConverterCacheMap.put (ConverterCollections.java:2433)
  at com.tangosol.coherence.component.util.collections.wrapperMap.WrapperNamedCache.put(WrapperNamedCache.CDB:1)
  to com.tangosol.coherence.component.net.extend.proxy.CacheServiceProxy$ WrapperNamedCache.put (CacheServiceProxy.CDB:2)
  to com.tangosol.coherence.component.net.extend.messageFactory.NamedCacheFactory$ PutRequest.onRun (NamedCacheFactory.CDB:6)
  at com.tangosol.coherence.component.net.extend.message.Request.run(Request.CDB:4)
  at com.tangosol.coherence.component.net.extend.proxy.NamedCacheProxy.onMessage(NamedCacheProxy.CDB:11)
  at com.tangosol.coherence.component.net.extend.Channel.execute(Channel.CDB:28)
  at com.tangosol.coherence.component.net.extend.Channel.receive(Channel.CDB:26)
  to com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer$ DaemonPool$ WrapperTask.run (Peer.CDB:9)
  to com.tangosol.coherence.component.util.DaemonPool$ WrapperTask.run (DaemonPool.CDB:32)
  to com.tangosol.coherence.component.util.DaemonPool$ Daemon.onNotify (DaemonPool.CDB:69)
  at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
  at java.lang.Thread.run(Thread.java:613)
  
  ClassLoader: java.net.URLClassLoader@b5f53a
  at com.tangosol.util.ExternalizableHelper.fromBinary(ExternalizableHelper.java:261)
  to com.tangosol.coherence.component.net.extend.proxy.CacheServiceProxy$ ConverterFromBinary.convert (CacheServiceProxy.CDB:4)
  to com.tangosol.util.ConverterCollections$ ConverterCacheMap.put (ConverterCollections.java:2433)
  at com.tangosol.coherence.component.util.collections.wrapperMap.WrapperNamedCache.put(WrapperNamedCache.CDB:1)
  to com.tangosol.coherence.component.net.extend.proxy.CacheServiceProxy$ WrapperNamedCache.put (CacheServiceProxy.CDB:2)
  to com.tangosol.coherence.component.net.extend.messageFactory.NamedCacheFactory$ PutRequest.onRun (NamedCacheFactory.CDB:6)
  at com.tangosol.coherence.component.net.extend.message.Request.run(Request.CDB:4)
  at com.tangosol.coherence.component.net.extend.proxy.NamedCacheProxy.onMessage(NamedCacheProxy.CDB:11)
  at com.tangosol.coherence.component.net.extend.Channel.execute(Channel.CDB:28)
  at com.tangosol.coherence.component.net.extend.Channel.receive(Channel.CDB:26)
  to com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer$ DaemonPool$ WrapperTask.run (Peer.CDB:9)
  to com.tangosol.coherence.component.util.DaemonPool$ WrapperTask.run (DaemonPool.CDB:32)
  to com.tangosol.coherence.component.util.DaemonPool$ Daemon.onNotify (DaemonPool.CDB:69)
  at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
  at java.lang.Thread.run(Thread.java:613)
  
  
  This is my config file -
  
  <>cache-config
  < cache-system-mapping >
  <>cache-mapping
  < name of cache - > * < / cache-name >
  < scheme name > - MY-reply-cache-system < / system-name >
  < / cache-mapping >
  < / cache-system-mapping >
  
  <>- cached patterns
  
  
  <!--
  Reproduces the caching scheme.
  ->
  
  < replicated system >
  < scheme name > - MY-reply-cache-system < / system-name >
  < service name > ReplicatedCache < / service-name >
  < support-map-plan >
  < local plan >
  < / local plan >
  < / support-map-plan >
  Member of < lease-granularity > < / lease-granularity >
  < autostart > true < / autostart >
  < / replicated system >
  
  
  < proxy-system >
  < service name > ExtendTcpProxyService < / service-name >
  < number of threads > 5 < / thread count >
  < Acceptor-config >
  <>tcp-Acceptor
  < address - >
  address <>server < / address >
  port < port > < / port >
  < / local-address >
  < receive-buffer-size > 768 k < / receive-buffer-size >
  <-> 768 k send buffer-size < / size of the buffer - send->
  < / tcp-Acceptor >
  < / Acceptor-config >
  < autostart > true < / autostart >
  < / proxy-system >
  < / cache-plans >
  < / cache-config >
  
  Published by: user1945969 on June 5, 2010 16:16

  By default, it should have used FIXED unit-calculator. But look at the track seems that your replicated cache used BINARY as unit-calculator.

  Could you try add FIXED in your configuration of cache for the cache to replicate.
  Or try just insert an object (the key and value) that implement binary.

  Check the part of the unit calculator on this link

  http://wiki.tangosol.com/display/COH35UG/local-scheme

• TopLink 10.1.3 does support synchronization of cache objects JPA?

  Hello
  
  Please forgive me if the answer to my question is obvious, but I have not seen it addressed anywhere in these terms. My organization has a configuration in cluster of OracleAS 10 g R3 with the last group of hotfixes, 10.1.3.5. As you know, Oracle AS 10g R3 includes TopLink and TopLink Essentials/JPA. I understand that TopLink implements mapping non - JPA object-relational and TopLink Essentials/JPA EJB 3.0 / JPA. I also understand that TopLink supports synchronization of cache, but TopLink Essentials/JPA doesn't support synchronization of the cache.
  
  My question is, the facts above assume that I can not use cache synchronization in an EJB 3.0 / JPA application deployed to OracleAS 10 g R3? Or is the real opposite I can configure and operate for the cache of TopLink-sync in my EJB 3.0 / JPA application? My application does not use the TopLink ORM, or use EJB 2.0 or lower objects.
  
  If there is no way to use the cache sync in this scenario, then my plans of cluster configuration just got a lot more complicated.
  
  Thank you
  FJ
  
  Published by: effdj on April 9, 2010 05:24
  
  Published by: effdj on April 9, 2010 08:41
  

• Notification of memory: library Cache object loaded into the SGA 63155 K heap size exceed the threshold of notification (51200K)

  Hello team...

  Last two days I get on my alert-log this error,.

  I did more things but not solved my problem:

  SQL > ALTER SYSTEM SET _kgl_large_heap_warning_threshold = 62914560 SCOPE = SPFILE;

  and restart db.

  but the error comes back alert-journal .

  Please help me solve this problem

  
  

  
  

  Kind regards

  Jayan V.

  Hi team,

  I increased the size of the heap, the alert not repeated in the alerts log.

  Thank you all, to spend your time to me.

  Kind regards

  Jayan V.

• Place an object on the coherence cache

  Hi all
  
  Is there a better way to do the following:
  
  In a region multi-threaded code, I perform the following sequence of steps:
  
  1. use a filter to check if foo object is already in the cache.
  2. If the result of the filter set is null, I perform a lock Cache.lock (foo.getUniqueID);
  3. I put the object foo on the cache Cache.put (foo);
  
  Basically, I try to avoid another thread overwrites the existing cache object.
  
  Is there a better way to do this?
  
  Kind regards
  Ankit

  Hi Pierre,.

  You can use a ConditionalPut EntryProcessor http://docs.oracle.com/cd/E24290_01/coh.371/e22843/toc.htm

  Filter filter = new NotFilter(PresentFilter.INSTANCE);
  cache.invoke(foo.getUniqueID(), new ConditionalPut(filter, foo));
  

  An EntryProcessor aura on a lock implicit button to no other EntryProcessor can run on the same key at the same time. The ConditionalPut will apply the filter specified in the entry (in this case to check that it is not present and if this value is true then will set the specified value.

  JK

• Cache.get (Object) when using the list and Arrays.asList as keys

  Hello
  
  I saw a problem when doing the cache.get (object) with the list. Here's my test.
  
  NamedCache cohCache = CacheFactory.getCache ("Test");
  
  Key is a list
  Key list = new ArrayList();
  Key.Add ("A");
  
  cohCache.put (key, 1);
  
  System.out.println ("Get with Arrays.asList:" + cohCache.get (Arrays.asList ("A")));
  System.out.println ("list:" + cohCache.get (key));
  System.out.println ("list is equal to Arrays.asList:" + Arrays.asList("A").equals (key));
  
  Actual output:
  
  Get with Arrays.asList: null
  List is equal to Arrays.asList: true
  Download list: 1
  
  Expected results:
  
  Get with Arrays.asList: 1
  List is equal to Arrays.asList: true
  Download list: 1
  
  
  Arrays.asList("A") and the key are equal but consistency does not return the value. I thought that, in cache.get (object) consistency returns if object.equals (key) is true.
  
  Any idea?
  
  Reg
  
  Fatou.

  Dasun.Weerasinghe wrote:
  Hello

  I saw a problem when doing the cache.get (object) with the list. Here's my test.

  NamedCache cohCache = CacheFactory.getCache ("Test");

  Key is a list
  Key list = new ArrayList();
  Key.Add ("A");

  cohCache.put (key, 1);

  System.out.println ("Get with Arrays.asList:" + cohCache.get (Arrays.asList ("A")));
  System.out.println ("list:" + cohCache.get (key));
  System.out.println ("list is equal to Arrays.asList:" + Arrays.asList("A").equals (key));

  Actual output:

  Get with Arrays.asList: null
  List is equal to Arrays.asList: true
  Download list: 1

  Expected results:

  Get with Arrays.asList: 1
  List is equal to Arrays.asList: true
  Download list: 1

  Arrays.asList("A") and the key are equal but consistency does not return the value. I thought that, in cache.get (object) consistency returns if object.equals (key) is true.

  Any idea?

  Reg

  Fatou.

  Hi Eric,.

  There is a slight misunderstanding in how you think that the works of coherence.

  For clustered caches Coherence does not return the value of the object key of equals to the key specified when caching, object instead, it returns When serialized forms of the key used to and used to get equal to one another.

  If you use no POF, then most of the time Java serialization is used to serialize the objects of key, and in any case if you don't use of POF, and the name of the serialized object class is in the serialized form.

  Now, the thing is that the key that you put in is a java.util.ArrayList. The key that you have tried to get with is a java.util.Arrays.ArrayList.
  It's two different classes, so the serialized forms that store the name of class implementation (which is true in this case) cannot be the same. So consistency is not going to put initially entrance the key that it uses (the serialized form) is actually different from the original key, so there is no entry for the key used in the get() method, and correctly you get back null.

  On the other hand, the two implementations ArrayList implement equals as defined in AbstractList, requiring not only the types of implementation of lists be the same, they apply just that the relation to the object is also a list, so two lists containing the same elements in the same order are equal as long as equals() on AbstractList is concerned, that's why your equals() check evaluates to true even if the types of implementation are different.

  Best regards

  Robert

  Published by: robvarga on May 2, 2012 11:44

• Reference to the actual object during extraction to the cache coherence in C++

  Hello
  Currently I use the copy constructor to get the real object reference. But because of that when whenever for some call wire get object creates a new object in the heap. Because I have a few times I keep this object in the local cache. Is there a way that we can avoid creating new objects in the heap.
  
  void * get_for_read_write_lock (const char * key) {}
  String::view objectKey = key;
  lock_locally (objectKey, "get");
  Managed < cache_obj >: view obj = cast < < cache_obj > Managed: View > (hCache-> get (objectKey));
  If (obj == NULL) {}
  COH_LOG2 ("get object NULL with key lock:", objectKey);
  unlock_locally (objectKey, "get");
  return null;
  }
  cache_obj valueOb = new cache_obj(*obj); *
  unlock_locally (objectKey, "get");
  valueOb-> set_cache (Thi, key);
  Return valueOb;
  }
  
  Kind regards
  Sura

  Hi Sura,

  Can you please specify if you want a mutable or immutable object. As you can with a thread earlier, out-of-process consistency puts cached objects return mutable objects immutable return hide in the process. The in-process caches back those unchangeable to prevent changing the return value to appear as if they were made in the cache.

  The boxing_map will return mutable objects, although they use your copy constructor to produce so there is really no performance advantage to use it. A final version is returned it is only because force us the call to the constructor of copy of you restore an unmanaged version.

  Mark

  The Oracle coherence

• Issue of result cache

  I create and populate the following table in my schema:
   create table plch_table (id number, time_sleep number);
  
  begin
    insert into plch_table values (1, 20);
    commit;
  end;
  / 
  Then I create this function (it compiles successfully, since my schema has EXECUTE authority on DBMS_LOCK):
   create or replace function plch_func
    return number
    result_cache
  is
    l_time_sleep number;
  begin
    select time_sleep
      into l_time_sleep
      from plch_table
     where id = 1;
     
    dbms_lock.sleep(l_time_sleep);
   
    return l_time_sleep;
  end;
  / 
  I then start up a second session, connected to the same schema, and execute this block:
   declare
    res number := plch_func;
  begin
    null;
  end;
  / 
  Within five seconds of executing the above block, I go back to the first session and I run this block:
   declare
    t1 number;
    t2 number;
  begin
    t1 := dbms_utility.get_time;
    dbms_output.put_line(plch_func);
    t2 := dbms_utility.get_time;
  
    dbms_output.put_line('Execute in '||round((t2-t1)/100)||' seconds');
  end;
  / 
  
  what will be displayed after this block executes?
  
  And the result is:
  
  20
  Execute in 30 seconds

  However, I do not understand why? I mean what happens behind all this? Why the 30 result? Could someone tell me why?

  Honestly, before the issue of PL/SQL challenge of yesterday, I had no idea how it worked either. It is much a deep internals question - you would probably pick up a post from presentation or very specialized blog get more details (or that you would have to do the research yourself). And even then, it is relatively unlikely that they would go in a lot more detail than the PL/SQL Challenge response has been. Julain Dyke result Cache Internals (PPT) is probably one of the more detailed presentations on the internals of the result cache.

  All of the valid statuses for a result cache object are documented in the entry reference of Oracle database to the view v$ result_cache_objects. Delays second two 10 are controlled by the session level settings and database of the resultcache_timeout undocumented parameter (which, based on this blog by Vladimir Begun has been fixed at 60 seconds in 11.1.0.6 and changed to 11.1.0.7 to 10 seconds.)

  Justin

• How to avoid the absences of the Cache?

  Hello
  
  
  Before I explain the problem, it's my current setup.
  
  -Partitioned/distributed cache
  -JPA annotated classes
  -Support card linked to an oracle database
  -Objects are stored in the POF format
  -C++ extend clients
  
  When I ask something that does not exist in the cache, the JPA magic forms a query and assembles the object and which stores in the cache.
  
  However if the query returns no results so consistent returns a lack of cache. Our hierarchy of existing objects may request items that do not exist (this infrastructure is vast and entrenched and changing, it's not an option). This blows near the performance of cache out of the water.
  
  What I want to do is to intercept a lack of cache and store a null object in the cache on this key (null, it will be 4 bytes of length). Client code can interpret the null as a lack of cache object and everything will work as usual - however the null object is stored in the cache and close performance will return.
  
  My problem is, as the JPA annotated done any 'magic', I do not get to intercept if the query returns an empty set. I tried both triggers of card and listeners, but as expected they don't called as no result set is generated.
  
  Does anyone know of a port of entry where I can return an object to consistency in the case of a query that returns an empty set. I also want the option to configure this behavior on a per-cache basis.
  
  Any help gratefully received.
  
  Thank you
  Rich
  
  Published by: Rich Carless on January 6, 2011 13:56

  Hello

  If you use 3.6 you can do so by writing a subclass of JpaCacheStore that implements BinaryEntryStore or way more genric (that would be for other people who have asked similar questions recently) would be to write an implementation of BinaryEntryStore that wraps another cache store.

  Here's one that I hit until recently...

  package org.gridman.coherence.cachestore;
  
  import com.tangosol.net.BackingMapManagerContext;
  import com.tangosol.net.CacheFactory;
  import com.tangosol.net.DefaultConfigurableCacheFactory;
  import com.tangosol.net.cache.BinaryEntryStore;
  import com.tangosol.net.cache.CacheStore;
  import com.tangosol.run.xml.XmlElement;
  import com.tangosol.util.Binary;
  import com.tangosol.util.BinaryEntry;
  
  import java.util.Set;
  
  public class WrapperBinaryCacheStore implements BinaryEntryStore {
  
      private BackingMapManagerContext context;
  
      private CacheStore wrapped;
  
      public WrapperBinaryCacheStore(BackingMapManagerContext context, ClassLoader loader, String cacheName, XmlElement cacheStoreConfig) {
          this.context = context;
          DefaultConfigurableCacheFactory cacheFactory = (DefaultConfigurableCacheFactory) CacheFactory.getConfigurableCacheFactory();
          DefaultConfigurableCacheFactory.CacheInfo info = cacheFactory.findSchemeMapping(cacheName);
          XmlElement xmlConfig = cacheStoreConfig.getSafeElement("class-scheme");
          wrapped = (CacheStore)cacheFactory.instantiateAny(info, xmlConfig, context, loader);
      }
  
      @Override
      public void erase(BinaryEntry binaryEntry) {
          wrapped.erase(binaryEntry.getKey());
      }
  
      @SuppressWarnings({"unchecked"})
      @Override
      public void eraseAll(Set entries) {
          for (BinaryEntry entry : (Set)entries) {
              erase(entry);
          }
      }
  
      @Override
      public void load(BinaryEntry binaryEntry) {
          Object value = wrapped.load(binaryEntry.getKey());
          binaryEntry.updateBinaryValue((Binary) context.getValueToInternalConverter().convert(value));
      }
  
      @SuppressWarnings({"unchecked"})
      @Override
      public void loadAll(Set entries) {
          for (BinaryEntry entry : (Set)entries) {
              load(entry);
          }
      }
  
      @Override
      public void store(BinaryEntry binaryEntry) {
          wrapped.store(binaryEntry.getKey(), binaryEntry.getValue());
      }
  
      @SuppressWarnings({"unchecked"})
      @Override
      public void storeAll(Set entries) {
          for (BinaryEntry entry : (Set)entries) {
              store(entry);
          }
      }
  
  }
  

  You re like this using the JPA example in the tutorial of 3.6 consistency of...

  
      jpa-distributed
      JpaDistributedCache
      
          
              
                  
              
              
                  
                      org.gridman.coherence.cachestore.WrapperBinaryCacheStore
                      
                          
                              com.tangosol.net.BackingMapManagerContext
                              {manager-context}
                          
                          
                              java.lang.ClassLoader
                              {class-loader}
                          
                          
                              java.lang.String
                              {cache-name}
                          
                          
                              com.tangosol.run.xml.XmlElement
                              
                                  
                                      com.tangosol.coherence.jpa.JpaCacheStore
                                      
                                          
                                              java.lang.String
                                              {cache-name}
                                          
                                          
                                              java.lang.String
                                              com.oracle.handson.{cache-name}
                                          
                                          
                                              java.lang.String
                                              JPA
                                          
                                      
                                  
                              
                          
                      
                  
              
          
      
      true
  
  

  As you can see it the WrapperBinaryCacheStore takes four parameters cpnstructor (configured in the settings-init)
  

• First is the card holder frame
  
• Second is the ClassLoader
  
• Third is the name of cache
  
• Fourth is the XML configuration for the cache store that you want to encapsulate

  If the load method of the wrapped store cache returns null (i.e. nothing in DB corresponds to the key), then instead of returning null, the BinaryEntry is updated with a binary file that represents the null value. Because the corresponding key is now in the cache with a null value, then the cache store is not recalled for the same key.

  Note If you do this, and then later your DB is updated with the values for the keys Traoré were previously null (by something other than consistency) then coherence does not charge them because he is never going to charge for these keys.

  I gave the above code a quick test and it seems to work fine.

  If you are using 3.5 then you can still do it but you must use the coherence incubator common library that has a version of BinaryCacheStore. The code and configuration will be similar but not identical.

  JK

  Edited by: Jonathan.Knight January 6, 2011 15:50

• Connection to the Cache

  Hello
  
  cache = CacheFactory.getCache)
  "VirtualCache");
  
  Above statement causes the JVM start instance of coherence and provide the object of "cache" to the query. My question is that how to connect from another machine virtual JAVA to the JVM that is running from the cache. I want to connect to the cache running and get the "cache" object (RMI?), not to start another instance of cache in another machine virtual JAVA.
  
  I am making sense or there at - it a simpler way to look at the operations of consistency?
  
  Kind regards
  Anand.

  How to get it to run two machines virtual Java and in one, your customer, add the property tangosol.coherence.distributed.localstorage = true. This will make a single node run your cache server while the other simply acts as a client.

  This uses UDP for communication (and default multicast). It is best to connect via TCP, which you can do via the service TCP expand - useful if you connect through less reliable networks between data centers, through the internet or C + c++ / .NET. It takes a bit more config but is conceptually similar. Details can be found here .

  Hope this helps

  B

  Published by: Ben Stopford on Nov 26, 2009 08:57

• How to check if the persistence Unit objects are persistent or not?

  How to check if the persistence Unit objects are persistent or not?
  
  I have correctly set up and deploy the object used as a persistence in Oracle coherence unit according to the guide Chapter 6 of tutorial for Oracle coherence 3.5
  Using the RunEmployeeExample script, I had good results. I see that once the cache object is updated, the database table (employees) is also updated accordingly. Here is the result:

  2009-11-05 11:09:55.043/53.467 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member(Id=2, Timestamp=2009-11-05 11:09:54.867, Add
  ress=192.168.8.80:8089, MachineId=24656, Location=process:1684, Role=OracleRunEmployeeExample) joined Cluster with senior member 1
  2009-11-05 11:09:55.604/54.028 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 joined Service Management with senior memb
  er 1
  2009-11-05 11:09:56.885/55.309 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): TcpRing: connecting to member 2 using TcpSocket{Sta
  te=STATE_OPEN, Socket=Socket[addr=/192.168.8.80,port=8089,localport=4084]}
  2009-11-05 11:09:57.847/56.281 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 joined Service JpaDistributedCache with se
  nior member 1
  2009-11-05 11:09:57.917/56.341 Oracle Coherence GE 3.5.2/463 <D5> (thread=DistributedCache:JpaDistributedCache, member=1): Service JpaDistributed
  Cache: sending ServiceConfigSync containing 258 entries to Member 2
  2009-11-05 11:10:04.086/62.510 Oracle Coherence GE 3.5.2/463 <D5> (thread=DistributedCache:JpaDistributedCache, member=1): Deferring the distribu
  tion due to 1 pending configuration updates
  [EL Info]: 2009-11-05 11:10:14.36--ServerSession(2883071)--EclipseLink, version: Eclipse Persistence Services - 1.1.1.v20090430-r4097
  [EL Info]: 2009-11-05 11:10:22.312--ServerSession(2883071)--file:/C:/JDeveloper/mywork/AppJPA/JPA/classes/-JPA login successful
  2009-11-05 11:10:24.305/82.729 Oracle Coherence GE 3.5.2/463 <D5> (thread=DistributedCache:JpaDistributedCache, member=1): 3> Transferring 128 ou
  t of 257 primary partitions to member 2 requesting 128
  2009-11-05 11:10:25.697/84.121 Oracle Coherence GE 3.5.2/463 <D4> (thread=DistributedCache:JpaDistributedCache, member=1): 1> Transferring 129 ou
  t of 129 partitions to a node-safe backup 1 at member 2 (under 129)
  2009-11-05 11:10:25.857/84.281 Oracle Coherence GE 3.5.2/463 <D5> (thread=DistributedCache:JpaDistributedCache, member=1): Transferring 0KB of ba
  ckup[1] for PartitionSet{128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151,
  152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180,
  181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
  210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238,
  239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256} to member 2
  2009-11-05 11:10:40.678/99.102 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): TcpRing: disconnected from member 2 due to a kill r
  equest
  2009-11-05 11:10:40.678/99.102 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 left service Management with senior member
   1
  2009-11-05 11:10:40.678/99.102 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 left service JpaDistributedCache with seni
  or member 1
  2009-11-05 11:10:40.708/99.132 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member(Id=2, Timestamp=2009-11-05 11:10:40.708, Add
  ress=192.168.8.80:8089, MachineId=24656, Location=process:1684, Role=OracleRunEmployeeExample) left Cluster with senior member 1
  2009-11-05 11:10:40.879/99.303 Oracle Coherence GE 3.5.2/463 <Info> (thread=DistributedCache:JpaDistributedCache, member=1): Restored from backup
   128 partitions
  2009-11-05 11:10:40.879/99.303 Oracle Coherence GE 3.5.2/463 <D4> (thread=DistributedCache:JpaDistributedCache, member=1): 0, 1, 2, 3, 4, 5, 6, 7
  , 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 4
  4, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80
  , 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 11
  3, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
  2009-11-05 11:28:39.800/1178.224 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member(Id=2, Timestamp=2009-11-05 11:28:39.635, A
  ddress=192.168.8.80:8089, MachineId=24656, Location=site:metsys.metex.com,machine:mw12,process:1752, Role=CoherenceConsole) joined Cluster with s
  enior member 1
  2009-11-05 11:28:40.231/1178.655 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 joined Service Management with senior me
  mber 1
  2009-11-05 11:28:41.633/1180.057 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): TcpRing: connecting to member 2 using TcpSocket{S
  tate=STATE_OPEN, Socket=Socket[addr=/192.168.8.80,port=8089,localport=4143]}
  2009-11-05 11:30:01.658/1260.082 Oracle Coherence GE 3.5.2/463 <D5> (thread=Cluster, member=1): Member 2 joined Service DistributedCache with sen
  ior member 2

  But I can't check whether the persistence unit is still persistent.
  
  Published by: jetq on November 5, 2009 11:49

  Re:

      Does the above result shows that the persistence work is finished successfully?
     
  

  Yes, it's nice. What is persistence. These are the characteristics of persistence.

  Junez