pooling

Pool of Objects - Synchronize - Delphi

由 可紊 提交于 2019-12-08 05:44:31
问题 I am implementing a pool of objects in Delphi. I need to synchronize the threads to get the objects from the pool. Thread Code: uClientQueryPool.CLIENT_POOL_GUARD.Acquire(); QueryClient := QUERY_POOL.GetClient(); uClientQueryPool.CLIENT_POOL_GUARD.Release; Pool Code: var CLIENT_POOL_GUARD: TCriticalSection; type TClientQueryPool = class public function GetClient(): TQueryClient; end; The CLIENT_POOL_GUARD is a unit variable. The pool is working well, but can I use "uClientQueryPool.CLIENT

How to implement L2-norm pooling in Keras?

由 旧巷老猫 提交于 2019-12-08 05:02:34
问题 I would like to add a global temporal pooling layer to my CNN that has three different pooling functions: mean, maximum, and L2-norm. Keras has mean and maximum pooling functions but I haven't been able to find one for L2. How could I implement this myself? 回答1: I was also looking for this, there's no such pool out of the box in keras. But you can implement it with the Lambda Layer from keras.layers import Lambda import keras.backend as K def l2_norm(x): x = x ** 2 x = K.sum(x, axis=1) x = K

Java Servlet Pooling

由 穿精又带淫゛_ 提交于 2019-12-07 14:02:54
问题 Servlets 101, under Tomcat 6: Could someone kindly point me to a good explanation of the best way to eg. create a Collection of expensive Foo objects at servlet startup time and stash them somewhere where I can access them while processing each request? Near as I can tell there are at least three ways to do this and I am a bit fuzzy on the difference. I am not concerned with clustering or algorithms to evict stale entries or anything like that, just the basics. Cheers and Thanks. 回答1:

Spring connection pooling issue

由 [亡魂溺海] 提交于 2019-12-07 09:04:08
问题 I'm not experienced in Java and Spring. I try to write a program that uses JdbcTemplate for Data access. I use DBCP pooling, here it is: <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" /> <property name="url" value="jdbc:oracle:thin:@192.168.2.7:1521:xe" /> <property name="username" value="manifesto" /> <property name="password" value="manifesto" /> <property name="initialSize" value="2" />

org.apache.tomcat.jdbc.pool.DataSource is no longer in the tomcat 7 dbcp jar?

由 徘徊边缘 提交于 2019-12-07 05:59:34
问题 I am trying to create a spring-managed standalone pool for tomcat-dbcp using the version 7.0.30 of tomcat-dbcp.jar However it seems the org.apache.tomcat.jdbc.DataSource class that is referred to in the Tomcat's documentation (http://tomcat.apache.org/tomcat-7.0-doc/jdbc-pool.html#Standalone) <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close"> <property name="factory" value="org.apache.tomcat.jdbc.pool.DataSourceFactory" /> <property name="type" value=

Connection pooling with Java and MySQL in Tomcat web application

由 孤者浪人 提交于 2019-12-06 07:52:28
问题 I recently wrote and deployed a Java web application to a server and I'm finding an unusual problem which didn't appear during development or testing. When a user logs in after so long and goes to display data from the database, the page indicates that there are no records to see. But upon page refresh, the first x records are shown according to the pagination rules. Checking the logs, I find: ERROR|19 09 2009|09 28 54|http-8080-4|myDataSharer.database_access.Database_Metadata_DBA| - Error

Is there a standard way of implementing a proprietary connection pool in .net?

由 最后都变了- 提交于 2019-12-06 03:19:41
问题 Is there a standard connection pooling model (or API) similar to that used by the data providers in .net that I could use to implement my own connection pool? I ask because I have a requirement to implement my own connection pool to a proprietary TCP/IP device that we use in a web service. The current problem is that there are lot of connections (read too many) to the device due to the threaded nature of web services running under IIS. I want to limit the number of these connections using my

Thread Pool vs Many Individual Threads

由 人走茶凉 提交于 2019-12-05 23:15:01
问题 I'm in the middle of a problem where I am unable decide which solution to take. The problem is a bit unique. Lets put it this way, i am receiving data from the network continuously (2 to 4 times per second). Now each data belongs to a different, lets say, group. Now, lets call these groups, group1, group2 and so on. Each group has a dedicated job queue where data from the network is filtered and added to its corresponding group for processing. At first I created a dedicated thread per group

Java Servlet Pooling

由 非 Y 不嫁゛ 提交于 2019-12-05 19:47:10
Servlets 101, under Tomcat 6: Could someone kindly point me to a good explanation of the best way to eg. create a Collection of expensive Foo objects at servlet startup time and stash them somewhere where I can access them while processing each request? Near as I can tell there are at least three ways to do this and I am a bit fuzzy on the difference. I am not concerned with clustering or algorithms to evict stale entries or anything like that, just the basics. Cheers and Thanks. Implement a ServletContextListener , do the desired loading task during contextInitialized() and store the result

Database Connections Timing Out (Connection Pooling On Tomcat)

由 爱⌒轻易说出口 提交于 2019-12-04 16:49:21
My dB connections are constantly timing out. I looked through some of the solutions people have offered to this, and have implemented them, but nothing has worked out till now. Any new thoughts, will be very helpful. Problem For some requests to the webapp, this is the error I am getting : com.mysql.jdbc.CommunicationsException: The last packet successfully received from the server was 11,198,881 milliseconds ago. The last packet sent successfully to the server was 11,198,881 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and
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