I have a system with 15 services. I'm new to camel and JMS remoting. With 15 services I thought I should have one incoming queue per Service.
However, it seems that a queue can only bind to one interface:
org.apache.camel.example.server.Treble implements two interfaces
org.apache.camel.example.server.Multiplier and org.apache.camel.example.server.Divider. I bind the two interfaces to the same JMS queue: jms:queue:numbers
<bean id="multiplier" class="org.apache.camel.spring.remoting.CamelServiceExporter">
<property name="uri" value="jms:queue:numbers" />
<property name="service">
<bean class="org.apache.camel.example.server.Treble" />
</property>
<property name="serviceInterface" value="org.apache.camel.example.server.Multiplier" />
</bean>
<bean id="divider" class="org.apache.camel.spring.remoting.CamelServiceExporter">
<property name="uri" value="jms:queue:numbers" />
<property name="service">
<bean class="org.apache.camel.example.server.Treble" />
</property>
<property name="serviceInterface" value="org.apache.camel.example.server.Divider" />
</bean>
I found only the first binding(org.apache.camel.example.server.Multiplier) works. On the client side, I get a proxy of org.apache.camel.example.server.Divider and call divide(). The message can reach the server side. But when Camel tries to process the message, camel only cache the proxy of the first interface binding to jms:queue:numbers. So it failed to process the message and throw an exception
So does that mean if I want to use jms remoting with camel I'll need a 2 queues (in/Out)/class? Is that expensive?
If you need all your services to use the same incoming end point then use the router http://camel.apache.org/dynamic-router.html
Related
The following xml config file stops working after 8 hours of inactivity with this Error:
ERROR: Already closed.
25-may-2017 8:45:23 org.apache.catalina.core.StandardWrapperValve invoke
Servlet.service() for servlet [dispatcher] in the context with path [/system] threw exception [Request processing failed; nested exception is org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: JDBC begin transaction failed: ] with root cause:
java.net.SocketException: **Software caused connection abort: recv failed**
Below is the Configuration file:
<context:component-scan base-package="es.company.system.persistence" />
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="es.mypackage.model"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">false</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="connection.url" value="jdbc:mysql://localhost:3306/system" />
<property name="connection.username" value="???" />
<property name="connection.password" value="???" />
<property name="hibernate.c3p0.min_size" value="5" />
<property name="hibernate.c3p0.max_size" value="20" />
<property name="hibernate.c3p0.timeout" value="1800"/>
<property name="hibernate.c3p0.max_statements" value="50" />
<property name="hibernate.c3p0.testConnectionOnCheckout" value="true" />
<property name="hibernate.c3p0.privilegeSpawnedThreads" value="true" />
<property name="hibernate.c3p0.contextClassLoaderSource" value="library" />
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" />
<tx:annotation-driven transaction-manager="transactionManager" />
I'm currently using Spring MVC 4.3.8 and Hibernate 4.1.9. with C3P0 conections pool for MySQL. I thought with C3P0 this would be solved, but it's not.
Anyone knows what's wrong?
Thanks!!!
Software caused connection abort: recv failed --
This usually means that there was a network error, such as a TCP timeout.
also set timeout param with default = 0 for hibernate.c3p0.timeout
hibernate.c3p0.timeout – When an idle connection is removed from the
pool (in second). Hibernate default: 0, never expire.
set autoReconnect , hibernate.c3p0.autoReconnect = true or as url connection param : jdbc:mysql://localhost:3306/test?autoReconnect=true
Add < property name="hibernate.c3p0.preferredTestQuery">SELECT 1</property>
and check it log that c3p0 execute it(if not add real select count(1) from real table with limit 1). Also check your network timeout
I have experienced this issues some time google cloud sql where the SQL server breaks all the connection after idle time out of 10 hrs. But in the application we still have the sessionFactory instance and can create sessions but when you actually fire a db query it fails with broken connection exception.
None of the below attempts worked.
1. auto reconnect set in connection url
2. auto reconnect, timeout, validation properties in xml file.
3. Wrote a polling service to make a jdbc call to keep the connection active for every 8 hrs (<10 hrs idle time out period)
4. Closed and opened new sessionFactory for every db operation.
Finally i have created a polling service which will shutdown the sessiongFactory and create a new one.
NOTE: Calling close method on sessionFactory object is not sufficient. You need to explicit set it to null;
This may be a workaround but it saved me from day restart of the application.
I was not using spring just rest service with hibernate.
Hi all fellow Java Geeks,
I have lots of stored procedures in a MySQL database, which I can call successfully from .NET. However, when calling them from Java Spring SimpleJdbcCall.execute() I get an exception telling me that the user doesn't have the privilege to do so. But that is clearly not the case since the same user can access it both from CLI and .NET.
I would therefore like to set this parameter:
noAccessToProcedureBodies=true
However, when adding the parameter in my url in the connector bean below, it thinks that the trailing characters are a part of the database name.
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="username">
<value>user</value>
</property>
<property name="url">
<value>jdbc:mysql://192.168.0.1:3306/database/?noAccessToProcedureBodies=true</value>
</property>
<property name="password">
<value>powerpass</value>
</property>
</bean>
I have been looking at overriding the getConnectionProperties method, but I don't think that's the right approach?
Thanks all
I found an answer myself, and it's working.
Instead of having an ending slash "database/?noAccess..." one should leave it:
<property name="url">
<value>jdbc:mysql://192.168.0.1:3306/database?noAccessToProcedureBodies=true</value>
</property>
Hope that help someone!
I'm trying to configure my web application like this:
1 tomcat server
2 mysql data bases in master/ master replication for failover purpose.
I also succeded to set up a pooled connexion using c3p0, thus avoiding to open a new connexion for each request(when no failover is involved)
I would like to use the failover support porvided by the jdbc connector in order to route request to the second database when the first one is unavailabe. Thus i'm using the fail over capability of the jdbc driver, simply by providing extra configuration parameters.
For the moment, when one server is unvailable, the requst are routed to the second available server. However, i'm facing a problem with a new opened connexion on the database for each request.
It seems that combaining connexion pooling and jdbc failover dosen't work toogther ?
Please advice, also regarding configuration parameters
<bean id="mydataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306,myOtherServer:3306/zeus?autoCommit=true&autoReconnect=true&autoReconnectForPools=true&failOverReadOnly=false"/>
<property name="user" value="root" />
<property name="password" value="root" />
<!-- these are C3P0 properties -->
<!-- property name="acquireIncrement" value="${acquireIncrement}" /_-->
<property name="minPoolSize" value="6" />
<property name="maxPoolSize" value="10" />
<property name="maxIdleTime" value="100" />
</bean>
I'm using spring 3.0 (jdbcTemplate), Tomcat, MySQL and C3p0 to handle my database activities. I'm using both jdbctemplate and simplejdbctemplate which will take care of creating and closing connections, statements, resultsets etc. I'm using C3p0 for connection pooling however the connections are remaining open and eventually the app will run out of connections.
Here is the configuration of my data source:
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close" >
<property name="driverClass" value="${jdbc.driverClassName}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="initialPoolSize" value="5"></property>
<property name="maxPoolSize" value="100"/>
<property name="minPoolSize" value="5"/>
<property name="maxIdleTime" value="30"/>
<property name="maxIdleTimeExcessConnections" value="30"/>
<property name="maxConnectionAge" value="30"/>
<property name="checkoutTimeout" value="100"/>
<property name="maxStatements" value="50"></property>
<property name="automaticTestTable" value="C3P0_TEST_TABLE"></property>
<property name="testConnectionOnCheckin" value="true"></property>
<property name="idleConnectionTestPeriod" value="30"></property>
</bean>
I'm also using TransactionManagement provided by spring - here is the configuration of that:
<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="txManager"/>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
Here is the rest of the datasource configuration:
<bean id="simpleJdbcTemplate" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">
<constructor-arg><ref bean="dataSource"/></constructor-arg>
</bean>
<bean id="userDAO" class="com.Test.dao.UserDAOImpl">
<property name="jdbcTemplate"><ref bean="jdbcTemplate"/></property>
</bean>
Finally here is a method where I update records into a database:
#Transactional(readOnly=false)
public void updateBenchMarkCumulative(List<BenchMarkCumulative> bmCumulativeList)
{
List<Object[]> parameters = new ArrayList<Object[]>();
for(BenchMarkCumulative bmCumulative : bmCumulativeList)
{
parameters.add(new Object[]{bmCumulative.getCumulativeAmt(), bmCumulative.getPkBenchMarkCumulative()});
}
this.simpleJdbcTemplate.batchUpdate(UPDATE_BENCHMARK_CUMULATIVE, parameters);
}
Is there something I'm doing wrong in my configuration or am I missing something that needs to be added to the configuration or coding?
Here is the exception being thrown:
INFO [http-8080-1] (AbstractPoolBackedDataSource.java510) - Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ java.beans.IntrospectionException: java.lang.reflect.InvocationTargetException [numThreadsAwaitingCheckoutDefaultUser] ]
org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections"
Thank you in advance.
Keith
I would agree with axtavt. I was in a similar situation, and there were couple places I was manually opening connections but not closing them (stored procedure calls for iSeries). Please verify if you have that kind of spots.
I am trying to submit data from spring mvc app to mysql . sometime i get the following error
org.springframework.dao.DataAccessResourceFailureException: StatementCallback; SQL [insert into networkwithusdb(company,firstname,lastname,email,address1,address2,city,state,zipcode,currentemployer,currentjobtitle,primarycareerarea,secondarycareerarea) values('HCA North Texas','dd','af','bhanukiran#imomentous.info','','','','KS','','','','Facilities','Facilities')]; Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1963)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2375)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2874)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3243)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1343)
at com.mysql.jdbc.Statement.executeUpdate(Statement.java:1260)
at org.apache.commons.dbcp.DelegatingStatement.executeUpdate(DelegatingStatement.java:228)
at org.springframework.jdbc.core.JdbcTemplate$1UpdateStatementCallback.doInStatement(JdbcTemplate.java:508)
at org.springframework.jdbc.core.JdbcTemplate$1UpdateStatementCallback.doInStatement(JdbcTemplate.java:1)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:395)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:518)
at com.imomentous.hcanorthtexas.service.DatabaseService.insertNetworkData(DatabaseService.java:58)
at com.imomentous.hcanorthtexas.controller.NetworkWithUsController.processNetworkWithUSForm(NetworkWithUsController.java:62)
[... snip ...]
** END NESTED EXCEPTION **
only few times i get this exception.
following are my configuration file:
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName">
<value>${database.driver}</value>
</property>
<property name="url">
<value>${database.url}</value>
</property>
<property name="username">
<value>${database.username}</value>
</property>
<property name="password">
<value>${database.password}</value>
</property>
<property name="maxActive" value="5" />
<property name="initialSize" value="3" />
<property name="validationQuery" value="SELECT 5 FROM DUAL" />
<property name="testOnBorrow" value="true" />
</bean>
and i am using the properties as:
database.driver =com.mysql.jdbc.Driver
database.url=jdbc:mysql://localhost:3306/XXXmobiledb
database.username=XXXX
database.password=XXXX
i am using:mysql-connector-java-5.0.5.jar
mysql server 5 .
sometimes database connection works properly and i get the result.
but sometimes it generates the error.
what might be the problem? If any have some idea please tell..thanks
The fact is that MySQL will disconnect the opened socket after a given time. You are advised to use a connection pool (such as c3p0).
See this post on the MySQL forum - http://forums.mysql.com/read.php?39,143312,180718#msg-180718. This should resolve it for you.
It might happen after a long time of inactivity add validation Query to your dataSource bean:
<property name="validationQuery">
<value>Select 1</value>
</property>
To avoid MySQL from disconnecting your session after a given idle time, you can use Spring OpenSessionInViewFilter or Interceptor to handle session.
This will require additional session filter settings in your web.xml file. You can mimic this post.