In this post under Java –> Security, I will explain with example the use of DigestOutputStream class. When any stream class under java.io package is used, the data flows from source to destination in a stream. DigestOutputStream class can be used to calculate a Message Digest when data is being written to the destination using…… Continue reading DigestOutputStream Class Example
Excluding exceptions from skipping
In my previous posts under Spring Batch, I showed that when reading, processing or writing records in a batch, exceptions can be thrown, we can skip them and move on to next record. This is done with xml configuration as shown below 1 <batch:job id="importEmployees"> 2 <batch:step id="readWriteEmployees"> 3 <batch:tasklet> 4 <batch:chunk reader="reader" writer="writer" commit-interval="50"…… Continue reading Excluding exceptions from skipping
Sending JMS messages in a Transaction
In this post under JMS, I will explain how to send JMS messages in a Transaction. If you are running your code in Java SE environment or Java EE application client side code. We create a transacted session by calling the below method on ConnectionFactory class and passing “JMSContext.SESSION_TRANSACTED” as session mode. public JMSContext createContext(int…… Continue reading Sending JMS messages in a Transaction
ExceptionClassifierSkipPolicy example
In this post under Spring Batch, I will explain with an example how to use Spring Batch provided ExceptionClassifierSkipPolicy class. ExceptionClassifierSkipPolicy will not contain the logic of how to handle exceptions when thrown. Instead it is a delegator class which passes the exceptions thrown to appropriate exception handling SkipPolicy classes. ExceptionClassifierSkipPolicy will contain a map…… Continue reading ExceptionClassifierSkipPolicy example
Setting JMS message priority
In this post under JMS, I will show with example how to set the priority of JMS messages before sending them. Note: I will be using JMS 2.0 api for this and future examples. JMS defines a ten level priority with 0 as the lowest priority and 9 as the highest. 0-4 is a normal…… Continue reading Setting JMS message priority
Configuring Multiple SkipListeners
In this post under Spring Batch, I will show with example how to configure multiple Skip listeners. In my previous post, I showed how to configure a bean as skip listeners. For recap purpose below is the xml for your reference 1 <bean id=”mySkipListener” class=”package25.MySkipListener”/> 2 3 <batch:job id=”importEmployees”> 4 <batch:step id=”readWriteEmployees”> 5 <batch:tasklet> 6…… Continue reading Configuring Multiple SkipListeners
QueueBrowser Example
In this post under JMS, I will explain with an example what is QueueBrowser and how to use it. Note: I will be using JMS 2.0 api for this and future examples. The name “QueueBrowser” implies two things 1) It can be used only for queue that means in point to point messaging model. 2)…… Continue reading QueueBrowser Example
Receiving JMS messages asynchronously
In this post under JMS I will explain how to receive messages asynchronously. Note: I will be using JMS 2.0 api for this and future examples. In all my previous post’s examples I have used “receive” method under “JSMConsumer” class to receive messages synchronously. To receive messages asynchronously we will take the help of “javax.jms.MessageListener”…… Continue reading Receiving JMS messages asynchronously
Sending JMS messages asynchronously
In this post, I will explain how to send JMS messages asynchronously. Note: I will be using JMS 2.0 api for this and future examples. When messages are sent asynchronously, the producer of the message won’t wait for acknowledgement from the provider. In this case, the producer uses callback approach so that he can be…… Continue reading Sending JMS messages asynchronously
Implementing Custom Skip Policy
In my previous posts under Spring Batch, I explained with example how to use built in out of the box skip policies. In this post I will explain how to create our own custom skip policy and use it. To create our own custom skip policy we need to implement the interface org.springframework.batch.core.step.skip.SkipPolicy as shown…… Continue reading Implementing Custom Skip Policy
