JpaSequencedDeadLetterQueue.Builder (Axon Framework 4.9.3 API)

java.lang.Object
- org.axonframework.eventhandling.deadletter.jpa.JpaSequencedDeadLetterQueue.Builder<T>

Type Parameters:

T - The type of Message maintained in this JpaSequencedDeadLetterQueue.

Enclosing class:

JpaSequencedDeadLetterQueue<M extends EventMessage<?>>
```
public static class JpaSequencedDeadLetterQueue.Builder<T extends EventMessage<?>>
extends Object
```
Builder class to instantiate an JpaSequencedDeadLetterQueue.
The maximum number of unique sequences defaults to 1024, the maximum amount of dead letters inside a unique sequence to 1024, the claim duration defaults to 30 seconds, the query page size defaults to 100, and the converters default to containing a single EventMessageDeadLetterJpaConverter.
If you have custom EventMessage to use with this queue, replace the current (or add a second) converter.
The processingGroup, EntityManagerProvider, TransactionManager and Serializer have to be configured for the JpaSequencedDeadLetterQueue to be constructed.

Constructor Summary

Constructors
Constructor and Description

Builder()

Constructors
Constructor and Description
`Builder()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`JpaSequencedDeadLetterQueue.Builder<T>`	`addConverter(DeadLetterJpaConverter<EventMessage<?>> converter)` Adds a `DeadLetterJpaConverter` to the configuration, which is used to deserialize dead-letter entries from the database.
`JpaSequencedDeadLetterQueue<T>`	`build()` Initializes a `JpaSequencedDeadLetterQueue` as specified through this Builder.
`JpaSequencedDeadLetterQueue.Builder<T>`	`claimDuration(Duration claimDuration)` Sets the claim duration, which is the time a message gets locked when processing and waiting for it to complete.
`JpaSequencedDeadLetterQueue.Builder<T>`	`clearConverters()` Removes all current converters currently configured, including the default `EventMessageDeadLetterJpaConverter`.
`JpaSequencedDeadLetterQueue.Builder<T>`	`entityManagerProvider(EntityManagerProvider entityManagerProvider)` Sets the `EntityManagerProvider` which provides the `EntityManager` used to access the underlying database for this `JpaSequencedDeadLetterQueue` implementation.
`JpaSequencedDeadLetterQueue.Builder<T>`	`eventSerializer(Serializer serializer)` Sets the `Serializer` to (de)serialize the event payload, event metadata, and diagnostics of the `DeadLetter` when storing it to the database.
`JpaSequencedDeadLetterQueue.Builder<T>`	`genericSerializer(Serializer serializer)` Sets the `Serializer` to (de)serialize the tracking token of the event in the `DeadLetter` when storing it to the database.
`JpaSequencedDeadLetterQueue.Builder<T>`	`maxSequences(int maxSequences)` Sets the maximum number of unique sequences this `SequencedDeadLetterQueue` may contain.
`JpaSequencedDeadLetterQueue.Builder<T>`	`maxSequenceSize(int maxSequenceSize)` Sets the maximum amount of `letters` per unique sequences this `SequencedDeadLetterQueue` can store.
`JpaSequencedDeadLetterQueue.Builder<T>`	`processingGroup(String processingGroup)` Sets the processing group, which is used for storing and querying which event processor the deadlettered item belonged to.
`JpaSequencedDeadLetterQueue.Builder<T>`	`queryPageSize(int queryPageSize)` Modifies the page size used when retrieving a sequence of dead letters.
`JpaSequencedDeadLetterQueue.Builder<T>`	`serializer(Serializer serializer)` Sets the `Serializer` to (de)serialize the event payload, event metadata, tracking token, and diagnostics of the `DeadLetter` when storing it to the database.
`JpaSequencedDeadLetterQueue.Builder<T>`	`transactionManager(TransactionManager transactionManager)` Sets the `TransactionManager` used to manage transaction around fetching event data.
`protected void`	`validate()` Validate whether the fields contained in this Builder are set accordingly.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Builder
```
public Builder()
```
- Method Detail
  - processingGroup
```
public JpaSequencedDeadLetterQueue.Builder<T> processingGroup(String processingGroup)
```
    Sets the processing group, which is used for storing and querying which event processor the deadlettered item belonged to.
    
    Parameters:
    
    processingGroup - The processing group of this SequencedDeadLetterQueue.
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - maxSequences
```
public JpaSequencedDeadLetterQueue.Builder<T> maxSequences(int maxSequences)
```
    Sets the maximum number of unique sequences this SequencedDeadLetterQueue may contain.
    The given maxSequences is required to be a positive number, higher or equal to 128. It defaults to 1024.
    
    Parameters:
    
    maxSequences - The maximum amount of unique sequences for the queue under construction.
    
    Returns:
    
    The current Builder, for fluent interfacing.
  - maxSequenceSize
```
public JpaSequencedDeadLetterQueue.Builder<T> maxSequenceSize(int maxSequenceSize)
```
    Sets the maximum amount of letters per unique sequences this SequencedDeadLetterQueue can store.
    The given maxSequenceSize is required to be a positive number, higher or equal to 128. It defaults to 1024.
    
    Parameters:
    
    maxSequenceSize - The maximum amount of letters per unique sequence.
    
    Returns:
    
    The current Builder, for fluent interfacing.
  - entityManagerProvider
```
public JpaSequencedDeadLetterQueue.Builder<T> entityManagerProvider(EntityManagerProvider entityManagerProvider)
```
    Sets the EntityManagerProvider which provides the EntityManager used to access the underlying database for this JpaSequencedDeadLetterQueue implementation.
    
    Parameters:
    
    entityManagerProvider - a EntityManagerProvider which provides the EntityManager used to access the underlying database
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - transactionManager
```
public JpaSequencedDeadLetterQueue.Builder<T> transactionManager(TransactionManager transactionManager)
```
    Sets the TransactionManager used to manage transaction around fetching event data. Required by certain databases for reading blob data.
    
    Parameters:
    
    transactionManager - a TransactionManager used to manage transaction around fetching event data
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - serializer
```
public JpaSequencedDeadLetterQueue.Builder<T> serializer(Serializer serializer)
```
    Sets the Serializer to (de)serialize the event payload, event metadata, tracking token, and diagnostics of the DeadLetter when storing it to the database.
    
    Parameters:
    
    serializer - The serializer to use
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - eventSerializer
```
public JpaSequencedDeadLetterQueue.Builder<T> eventSerializer(Serializer serializer)
```
    Sets the Serializer to (de)serialize the event payload, event metadata, and diagnostics of the DeadLetter when storing it to the database.
    
    Parameters:
    
    serializer - The serializer to use
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - genericSerializer
```
public JpaSequencedDeadLetterQueue.Builder<T> genericSerializer(Serializer serializer)
```
    Sets the Serializer to (de)serialize the tracking token of the event in the DeadLetter when storing it to the database.
    
    Parameters:
    
    serializer - The serializer to use
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - clearConverters
```
public JpaSequencedDeadLetterQueue.Builder<T> clearConverters()
```
    Removes all current converters currently configured, including the default EventMessageDeadLetterJpaConverter.
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - addConverter
```
public JpaSequencedDeadLetterQueue.Builder<T> addConverter(DeadLetterJpaConverter<EventMessage<?>> converter)
```
    Adds a DeadLetterJpaConverter to the configuration, which is used to deserialize dead-letter entries from the database.
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - claimDuration
```
public JpaSequencedDeadLetterQueue.Builder<T> claimDuration(Duration claimDuration)
```
    Sets the claim duration, which is the time a message gets locked when processing and waiting for it to complete. Other invocations of the JpaSequencedDeadLetterQueue.process(Predicate, Function) method will be unable to process a sequence while the claim is active. Its default is 30 seconds.
    Claims are automatically released once the item is requeued, the claim time is a backup policy in case of unforeseen trouble such as down database connections.
    
    Parameters:
    
    claimDuration - The longest claim duration allowed.
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - queryPageSize
```
public JpaSequencedDeadLetterQueue.Builder<T> queryPageSize(int queryPageSize)
```
    Modifies the page size used when retrieving a sequence of dead letters. Defaults to 100 items in a page.
    
    Parameters:
    
    queryPageSize - The page size
    
    Returns:
    
    the current Builder instance, for fluent interfacing
  - build
```
public JpaSequencedDeadLetterQueue<T> build()
```
    Initializes a JpaSequencedDeadLetterQueue as specified through this Builder.
    
    Returns:
    
    A JpaSequencedDeadLetterQueue as specified through this Builder.
  - validate
```
protected void validate()
```
    Validate whether the fields contained in this Builder are set accordingly.
    
    Throws:
    
    AxonConfigurationException - When one field asserts to be incorrect according to the Builder's specifications.

Class JpaSequencedDeadLetterQueue.Builder<T extends EventMessage<?>>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Builder

Method Detail

processingGroup

maxSequences

maxSequenceSize

entityManagerProvider

transactionManager

serializer

eventSerializer

genericSerializer

clearConverters

addConverter

claimDuration

queryPageSize

build

validate