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SAP Connector 5.0 Reference

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Anypoint Connector for SAP (SAP Connector) provides a class that has an overall configuration for the SAP extension.

SAP Connector 5.0 also supports connecting to an on-premise instance of SAP S/4HANA.
SNC is not supported for use in Mule apps that deploy SAP Connector in CloudHub and Anypoint Runtime Fabric.

Configurations


SAP Configuration

The following parameters are for the default configuration for SAP extension inbound and outbound elements:

Parameters

Name Type Description Default Value Required

Name

String

The name for this configuration. Connectors reference the configuration with this name.

x

Connection

The connection types to provide to this configuration.

x

Expiration Policy

Configures the minimum amount of time that a dynamic configuration instance can remain idle before the runtime considers it eligible for expiration. This does not mean that the platform expires the instance at the exact moment that it becomes eligible. The runtime purges the instances when appropriate.

Encoding

String

Canonical name of the encoding. See Oracle’s supported encodings at https://docs.oracle.com/javase/7/docs/technotes/guides/intl/encoding.doc.html.

Default IDoc Version

String

Default IDoc version.

0

Disable Jco Internal Cache

Boolean

Set this flag to true to use the JCo internal cache.

false

Evaluate Response Flag

Boolean

Flag that indicates if an error response should throw an exception or let the user handle it as another result

false

Log Trace Flag

Boolean

Set this flag to true to log the trace on the Mule server.

false

Use SAP Format

Boolean

This parameter was added to support the Mule 3 format for returning SAP values. It is used in the JCoToBusinessObjectParser class when parsing a JCoField. When set to true, values are returned as strings with the original SAP format. When set to false, the original values are converted to the corresponding Java objects, serialized, and returned.

false

Connection Types

Certificate

Use these parameters to configure a connection provider that relies on an X509 certificate to authenticate the user.

Parameters
Name Type Description Default Value Required

SAP system number

String

The two-digit system number (sysnr) of the SAP system

x

SAP client ID

String

Three-digit client number. Leading zeros are preserved if they appear in the number.

x

Destination Name

String

Identifier of the destination generated by this connector. If none is set, then a random value is created.

Login language

String

The language code used by the connector. The language determines the code page used for communicating between the SAP Adapter and the application server.

EN

Extended Properties

Object

Use to pass in all the database server-specific connection parameters

X.509 Certificate

String

Path to the X.509 certificate. This is required when the connector is working as a client.

Application server host

String

The host of the SAP application server

Message server configuration

The configuration for message server usage

Enable RFC tracing on server

Boolean

Enable or disable RFC trace on the server

false

Enable CPIC tracing on server

Enumeration, one of:

  • INHERIT

  • NO_TRACING

  • LEVEL_1

  • LEVEL_2

  • LEVEL_3

Enable or disable RFC trace on the server.

Reconnection

When the application is deployed, a connectivity test is performed on all connectors. If set to true, deployment fails if the test doesn’t pass after exhausting the associated reconnection strategy.

Simple Connection Provider

Use these parameters to configure a connection provider that connects using a username and password.

Parameters
Name Type Description Default Value Required

SAP system number

String

The two-digit system number (sysnr) of the SAP system

x

SAP client ID

String

Three-digit client number. Leading zeros are preserved if they appear in the number.

x

Destination Name

String

Identifier of the destination generated by this connector. If none is set, then a random value is created.

Login language

String

The language code used by the connector. The language determines the code page used for communicating between the SAP Adapter and the application server.

EN

Extended Properties

Object

Use to pass in all the database server-specific connection parameters.

Username

String

The username the connector uses to log in to SAP

x

Password

String

The password associated with the login username

x

Application server host

String

The host of the SAP application server

Message server configuration

The configuration for message server usage

Enable RFC tracing on server

Boolean

Enable or disable RFC trace on the server

false

Enable CPIC tracing on server

Enumeration, one of:

  • INHERIT

  • NO_TRACING

  • LEVEL_1

  • LEVEL_2

  • LEVEL_3

Enable or disable RFC trace on the server.

Reconnection

When the application is deployed, a connectivity test is performed on all connectors. If set to true, deployment fails if the test doesn’t pass after exhausting the associated reconnection strategy.

Operations

Associated Sources

Asynchronous Remote Function Call

<sap:async-rfc>

The asynchronous Remote Function Call (aRFC) executes a BAPIFunction over a queued Remote Function Call (qRFC). A queued RFC is an extension of a transactional RFC (tRFC) that ensures that individual steps are processed in sequence. Use qRFC to guarantee that multiple Logical Unit of Work (LUWs) transactions are processed in the order specified by the application. You can use inbound and outbound queues to serialize tRFC, hence the name queued RFC (qRFC).

qRFC is best used for:

  • Extension of the Transactional RFC

  • Defined processing sequence.

qRFC is recommended if you want to guarantee that several transactions are processed in a predefined order.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Key

String

The name of the function to execute

x

Content

Binary

The BAPIFunction to execute

#[payload]

Transaction Id

String

The ID that identifies an RFC so it’s run only once

x

Queue Name

String

The name of the queue on which the RFC executes

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take regarding transactions

JOIN_IF_POSSIBLE

Reconnection Strategy

A retry strategy in case of connectivity errors

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Confirm transaction

<sap:confirm-transaction-id>

Configure the following parameters to confirm a determined transaction.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Transaction ID (TID)

String

The ID of the transaction to confirm

x

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take regarding transactions

JOIN_IF_POSSIBLE

Reconnection Strategy

A retry strategy in case of connectivity errors

For Configurations

Throws

  • SAP:RETRY_EXHAUSTED

  • SAP:CONNECTIVITY

Start SAP transaction

<sap:create-transaction-id>

Creates a transaction ID to use as part of future calls.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use.

x

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take for transactions

JOIN_IF_POSSIBLE

Target Variable

String

The name of a variable to store the operation’s output

Target Value

String

An expression to evaluate against the operation’s output and store the expression outcome in the target variable

#[payload]

Reconnection Strategy

A retry strategy in case of connectivity errors

Output

Type

String

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Get Function

<sap:get-function>

Retrieves a BAPIFunction based on its name.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use.

x

Key

String

The name of the function to retrieve.

x

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take regarding transactions

JOIN_IF_POSSIBLE

Streaming Strategy

Configure to use repeatable streams

Target Variable

String

The name of a variable to store the operation’s output

Target Value

String

An expression to evaluate against the operation’s output and store the expression outcome in the target variable

#[payload]

Reconnection Strategy

A retry strategy in case of connectivity errors

Output

Type

Binary

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Retrieve IDoc

<sap:retrieve-idoc>

Retrieves an IDoc based on its key.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Key

String

The key that contains the required information to retrieve the IDoc

x

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take regarding transactions

JOIN_IF_POSSIBLE

Streaming Strategy

Configure to use repeatable streams

Target Variable

String

The name of a variable to store the operation’s output

Target Value

String

An expression to evaluate against the operation’s output and store the expression outcome in the target variable

#[payload]

Reconnection Strategy

A retry strategy in case of connectivity errors

Output

Type

Binary

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Send IDoc

<sap:send>

Sends an IDoc to SAP over an RFC. An RFC can be one of two types for IDocuments:

  • Transactional (tRFC)
    A tRFC is a special form of asynchronous Remote Function Call (aRFC). Transactional RFC ensures transaction-like handling of processing steps that were originally handled autonomously. tRFC is an asynchronous communication method that executes the called function module in the RFC server only once, even if the data is sent multiple times due to some network issue. The remote system need not be available at the time the RFC client program is executing a tRFC.
    The tRFC component stores the called RFC function, together with the corresponding data, in the SAP database under a unique transaction ID (TID). tRFC is similar to aRFC in that it does not wait at the target system (similar to a registered post). If the system is not available, the data is written into aRFC tables with a transaction ID (SM58) that is chosen by the scheduler RSARFCSE and run every 60 seconds.
    tRFC is best used for:

    • Extension of Asynchronous

    • RFC Secure communication between systems

  • Queued (qRFC)
    A queued RFC is an extension of tRFC. It also ensures that individual steps are processed in sequence. Use qRFC to guarantee that multiple LUWs (Logical Unit of Work transactions) are processed in the order specified by the application. tRFC can be serialized using inbound and outbound queues, hence the name queued RFC (qRFC).
    qRFC is best used as an extension of tRFC to define a processing sequence. Implementation of qRFC is recommended if you want to guarantee that several transactions are processed in a predefined order.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Key

String

The name of the IDoc to execute

x

Content

Binary

The IDoc to execute

#[payload]

Version

String

The version on the IDoc

Transaction Id

String

The ID that identifies an RFC so it runs only once

Queue Name

String

The name of the queue on which the RFC executes

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take for transactions

JOIN_IF_POSSIBLE

Reconnection Strategy

A retry strategy in case of connectivity errors

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Synchronous Remote Function Call

<sap:sync-rfc>

Executes a BAPIFunction over a Synchronous Remote Function Call (sRFC). A synchronous RFC requires both the systems (client and server) to be available at the time of communication or data transfer. It is the most common type and is required when a result is required immediately after the execution of sRFC.

sRFC is a means of communication between systems where acknowledgments are required. The resources of the source system wait at the target system and ensure that they deliver the message or data with ACKD. The data is consistent and reliable for communication. The issue is if the target system is not available, the source system resources wait until the target system is available. This may lead to the processes of the source system to go into Sleep/RFC/CPIC mode at the target systems and thus blocks these resources.

sRFC is best used for:

  • Communication between systems

  • Communication between SAP Web Application Server to SAP GUI

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Key

String

The name of the function to execute

x

Content

Binary

The BAPIFunction to execute

#[payload]

Transactional Action

Enumeration, one of:

  • ALWAYS_JOIN

  • JOIN_IF_POSSIBLE

  • NOT_SUPPORTED

The type of joining action that operations can take for transactions

JOIN_IF_POSSIBLE

Streaming Strategy

Configure to use repeatable streams

Target Variable

String

The name of a variable to store the operation’s output

Target Value

String

An expression to evaluate against the operation’s output and store the expression outcome in the target variable

#[payload]

Reconnection Strategy

A retry strategy in case of connectivity errors

Output

Type

Binary

For Configurations

Throws

  • SAP:CONNECTIVITY

  • SAP:INVALID_CREDENTIALS_ERROR

  • SAP:COMMIT_TRANSACTION_ERROR

  • SAP:FIELD_NOT_FOUND_ERROR

  • SAP:BAPI_FUNCTION_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:CONFIRM_TRANSACTION_ERROR

  • SAP:IDOC_INPUT_STREAM_TRANSFORM_ERROR

  • SAP:BEGIN_TRANSACTION_ERROR

  • SAP:EXECUTION_ERROR

  • SAP:MISSING_CONTENT_ERROR

  • SAP:BAPI_FUNCTION_SERIALIZATION_ERROR

  • SAP:MISSING_BUSINESS_OBJECT_ERROR

  • SAP:BAPI_SERVER_INITIALIZATION_ERROR

  • SAP:CONNECTION_VALIDATION_ERROR

  • SAP:TID_CREATION_ERROR

  • SAP:ROLLBACK_TRANSACTION_ERROR

  • SAP:RETRY_EXHAUSTED

  • SAP:IDOC_SERVER_INITIALIZATION_ERROR

  • SAP:INVALID_HOST_ERROR

Sources

Document Source

<sap:document-listener>

Use these parameters to configure the source that listens for incoming IDoc documents.

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Gateway Host

String

Name of the host running the gateway server

x

Gateway Service

String

Either the name or service port for the gateway service of the SAP system

x

Program ID

String

SAP system program ID that is registered on the gateway. This must be unique for the given gateway.

x

Connection Count

Number

The number of connections to register on the gateway

1

Idoc Type Filter Regex

String

Expression to filter all incoming iDocuments by type

Transactional Action

Enumeration, one of:

  • ALWAYS_BEGIN

  • NONE

The type of beginning action that sources can take regarding transactions

NONE

Transaction Type

Enumeration, one of:

  • LOCAL

  • XA

The type of transaction to create. Availability depends on the runtime version.

LOCAL

Primary Node Only

Boolean

Determines whether this source should be executed only on the primary node when running in a cluster

Streaming Strategy

Configure to use repeatable streams

Redelivery Policy

Defines a policy for processing the redelivery of the same message

Reconnection Strategy

A retry strategy in case of connectivity errors

Output

Type

Binary

Attributes Type

For Configurations

Function Source

<sap:function-source>

Source that listens for BAPI functions.

For the request-response message exchange pattern these data types are supported:

  • Structure
    Contains fields, tables, and inner structures

  • Table
    Contains a list of rows

  • Fields
    The only element that contains an actual value

Parameters

Name Type Description Default Value Required

Configuration

String

The name of the configuration to use

x

Gateway Host

String

Name of the host running the gateway server

x

Gateway Service

String

Either the name or service port for the gateway service of the SAP system

x

Program ID

String

SAP system program ID that is registered on the gateway. Must be unique for the given gateway

x

Connection Count

Number

The number of connections to register on the gateway

1

Targeted Function

String

Filters the incoming BAPI functions by their name. The name of the function you want to receive.

Transactional Action

Enumeration, one of:

  • ALWAYS_BEGIN

  • NONE

The type of beginning action that sources can take regarding transactions

NONE

Transaction Type

Enumeration, one of:

  • LOCAL

  • XA

The type of transaction to create. Availability depends on the runtime version.

LOCAL

Primary Node Only

Boolean

Whether this source should be executed only on the primary node when running in a cluster

Streaming Strategy

Configure to use repeatable streams

Redelivery Policy

Defines a policy for processing the redelivery of the same message

Reconnection Strategy

A retry strategy in case of connectivity errors

Response

Binary

#[payload]

Output

Type

Binary

Attributes Type

For Configurations

Types

Message Server

Field Type Description Default Value Required

Host

String

The host of the message server

x

System Id

String

System ID of the SAP system

x

Port

Number

The port with which the connector logs in to the message server

Group

String

Group of SAP application servers

Router

String

SAP router string to use for a system protected by a firewall

Reconnection

The reconnection strategy for the SAP Connector applies to operations only.

When a connection fails on the FunctionSource or DocumentSource, the JCo server automatically tries to reestablish a connection in the following way:

  • If a connection issue occurs, the JCo server retries immediately.

  • If the connection is not restored immediately, the JCo server waits for one second and retries.

  • If the connection is not restored after the second retry, the JCo server waits for two seconds and retries.

  • If the connection is still not restored, the JCo server retries at four seconds, and then again at eight seconds.

Field Type Description Default Value Required

Fails Deployment

Boolean

When the application is deployed, a connectivity test is performed on all connectors. If set to true, deployment fails if the test doesn’t pass after exhausting the associated reconnection strategy.

Reconnection Strategy

The reconnection strategy to use

Reconnect

Field Type Description Default Value Required

Frequency

Number

How often to reconnect (in milliseconds)

Count

Number

The number of reconnection attempts to make

blocking

Boolean

If false, the reconnection strategy runs in a separate, non-blocking thread

true

Reconnect Forever

Field Type Description Default Value Required

Frequency

Number

How often in milliseconds to reconnect

blocking

Boolean

If false, the reconnection strategy runs in a separate, non-blocking thread

true

Expiration Policy

Field Type Description Default Value Required

Max Idle Time

Number

A scalar time value for the maximum amount of time a dynamic configuration instance should be allowed to be idle before it’s considered eligible for expiration

Time Unit

Enumeration, one of:

  • NANOSECONDS

  • MICROSECONDS

  • MILLISECONDS

  • SECONDS

  • MINUTES

  • HOURS

  • DAYS

A time unit that qualifies the maxIdleTime attribute

Sap Attributes

Field Type Description Default Value Required

Transaction Id

String

Repeatable In Memory Stream

Repeatable streams enable you to read a stream more than once and have concurrent access to the stream.

Use the following parameters to configure a repeatable in-memory stream:

Field Type Description Default Value Required

Initial Buffer Size

Number

Set the initial size of the buffer. This is the amount of memory to allocate to consume the stream and provide random access to it. If the stream exceeds the initial buffer size, the buffer expands according to the Buffer size increment attribute, with an upper limit of the value for Max in memory size.

Buffer Size Increment

Number

This value specifies how much the buffer size expands if it exceeds its initial size. Setting a value of zero or lower means that the buffer will not expand, and instead a STREAM_MAXIMUM_SIZE_EXCEEDED error is raised when the buffer gets full.

Max in Memory Size

Number

The maximum amount of memory to use. If more than that is used then a STREAM_MAXIMUM_SIZE_EXCEEDED error is raised.

Buffer Unit

Enumeration, one of:

  • BYTE

  • KB

  • MB

  • GB

The unit in which all these attributes are expressed

Repeatable File Store Stream

If you need to handle large or small files, you can change the buffer size (In memory size) to optimize performance:

  • Configuring a larger buffer size increases performance by avoiding the number of times Mule runtime engine needs to write the buffer to your disk, but it also limits the number of concurrent requests your application can process.

  • Configuring a smaller buffer size saves memory load.

Use the following parameters to configure a repeatable file store stream:

Field Type Description Default Value Required

In Memory Size

Number

Defines the maximum memory that the stream should use to keep data in memory. If more than that is consumed then it will start to buffer the content on disk.

Buffer Unit

Enumeration, one of:

  • BYTE

  • KB

  • MB

  • GB

The unit in which Max in memory size is expressed

Redelivery Policy

A redelivery policy is a filter that helps you conserve resources by limiting the number of times the Mule runtime engine (Mule) executes messages that generate errors. You can add a redelivery policy to any source in a flow.

Each time the source receives a new message, Mule identifies the message by generating its key.

  • If the processing flow causes an exception, Mule increments the counter associated with the message key. When the counter reaches a value greater than the configured Max redelivery count value, Mule throws a MULE:REDELIVERY_EXHAUSTED error.

  • If the processing flow does not cause an exception, its counter is reset.

Use the following parameters to configure the redelivery policy:

Field Type Description Default Value Required

Max Redelivery Count

Number

The maximum number of times a message can be redelivered and processed unsuccessfully before triggering a process failed message

5

Use Secure Hash

Boolean

Whether to use a secure hash algorithm to identify a redelivered message

true

Message Digest Algorithm

String

The secure hashing algorithm to use

SHA-256

Id Expression

String

Defines one or more expressions to use to determine when a message has been redelivered. You can only use this property if Use secure hash is false.

Object Store

Object Store

The object store where the redelivery counter for each message is stored