[[aws2-ddb-component]]
= AWS DynamoDB Component
:docTitle: AWS DynamoDB
:shortname: aws2-ddb
:artifactId: camel-aws2-ddb
:description: Store and retrieve data from AWS DynamoDB service using AWS SDK version 2.x.
:since: 3.1
:supportLevel: Stable
:component-header: Only producer is supported
//Manually maintained attributes
:group: AWS
:camel-spring-boot-name: aws2-ddb

*Since Camel {since}*

*{component-header}*

The AWS2 DynamoDB component supports storing and retrieving data from/to
https://aws.amazon.com/dynamodb[Amazon's DynamoDB] service.

Prerequisites

You must have a valid Amazon Web Services developer account, and be
signed up to use Amazon DynamoDB. More information is available at
https://aws.amazon.com/dynamodb[Amazon DynamoDB].

[NOTE]
====
The AWS2 DynamoDB component is not supported in OSGI
====

== URI Format

[source,java]
------------------------------
aws2-ddb://domainName[?options]
------------------------------

You can append query options to the URI in the following format,
?options=value&option2=value&...

== URI Options


// component options: START
The AWS DynamoDB component supports 21 options, which are listed below.



[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *amazonDDBClient* (producer) | *Autowired* To use the AmazonDynamoDB as the client |  | DynamoDbClient
| *configuration* (producer) | The component configuration |  | Ddb2Configuration
| *consistentRead* (producer) | Determines whether or not strong consistency should be enforced when data is read. | false | boolean
| *keyAttributeName* (producer) | Attribute name when creating table |  | String
| *keyAttributeType* (producer) | Attribute type when creating table |  | String
| *keyScalarType* (producer) | The key scalar type, it can be S (String), N (Number) and B (Bytes) |  | String
| *lazyStartProducer* (producer) | Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. | false | boolean
| *operation* (producer) | What operation to perform. There are 10 enums and the value can be one of: BatchGetItems, DeleteItem, DeleteTable, DescribeTable, GetItem, PutItem, Query, Scan, UpdateItem, UpdateTable | PutItem | Ddb2Operations
| *overrideEndpoint* (producer) | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option | false | boolean
| *proxyHost* (producer) | To define a proxy host when instantiating the DDB client |  | String
| *proxyPort* (producer) | The region in which DynamoDB client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example ap-east-1) You'll need to use the name Region.EU_WEST_1.id() |  | Integer
| *proxyProtocol* (producer) | To define a proxy protocol when instantiating the DDB client. There are 2 enums and the value can be one of: HTTP, HTTPS | HTTPS | Protocol
| *readCapacity* (producer) | The provisioned throughput to reserve for reading resources from your table |  | Long
| *region* (producer) | The region in which DDB client needs to work |  | String
| *trustAllCertificates* (producer) | If we want to trust all certificates in case of overriding the endpoint | false | boolean
| *uriEndpointOverride* (producer) | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option |  | String
| *useDefaultCredentialsProvider* (producer) | Set whether the S3 client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | boolean
| *writeCapacity* (producer) | The provisioned throughput to reserved for writing resources to your table |  | Long
| *autowiredEnabled* (advanced) | Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc. | true | boolean
| *accessKey* (security) | Amazon AWS Access Key |  | String
| *secretKey* (security) | Amazon AWS Secret Key |  | String
|===
// component options: END




// endpoint options: START
The AWS DynamoDB endpoint is configured using URI syntax:

----
aws2-ddb:tableName
----

with the following path and query parameters:

=== Path Parameters (1 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *tableName* | *Required* The name of the table currently worked with. |  | String
|===


=== Query Parameters (19 parameters):


[width="100%",cols="2,5,^1,2",options="header"]
|===
| Name | Description | Default | Type
| *amazonDDBClient* (producer) | *Autowired* To use the AmazonDynamoDB as the client |  | DynamoDbClient
| *consistentRead* (producer) | Determines whether or not strong consistency should be enforced when data is read. | false | boolean
| *keyAttributeName* (producer) | Attribute name when creating table |  | String
| *keyAttributeType* (producer) | Attribute type when creating table |  | String
| *keyScalarType* (producer) | The key scalar type, it can be S (String), N (Number) and B (Bytes) |  | String
| *lazyStartProducer* (producer) | Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing. | false | boolean
| *operation* (producer) | What operation to perform. There are 10 enums and the value can be one of: BatchGetItems, DeleteItem, DeleteTable, DescribeTable, GetItem, PutItem, Query, Scan, UpdateItem, UpdateTable | PutItem | Ddb2Operations
| *overrideEndpoint* (producer) | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option | false | boolean
| *proxyHost* (producer) | To define a proxy host when instantiating the DDB client |  | String
| *proxyPort* (producer) | The region in which DynamoDB client needs to work. When using this parameter, the configuration will expect the lowercase name of the region (for example ap-east-1) You'll need to use the name Region.EU_WEST_1.id() |  | Integer
| *proxyProtocol* (producer) | To define a proxy protocol when instantiating the DDB client. There are 2 enums and the value can be one of: HTTP, HTTPS | HTTPS | Protocol
| *readCapacity* (producer) | The provisioned throughput to reserve for reading resources from your table |  | Long
| *region* (producer) | The region in which DDB client needs to work |  | String
| *trustAllCertificates* (producer) | If we want to trust all certificates in case of overriding the endpoint | false | boolean
| *uriEndpointOverride* (producer) | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option |  | String
| *useDefaultCredentialsProvider* (producer) | Set whether the S3 client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | boolean
| *writeCapacity* (producer) | The provisioned throughput to reserved for writing resources to your table |  | Long
| *accessKey* (security) | Amazon AWS Access Key |  | String
| *secretKey* (security) | Amazon AWS Secret Key |  | String
|===
// endpoint options: END

// spring-boot-auto-configure options: START
// spring-boot-auto-configure options: END

Required DDB component options

You have to provide the amazonDDBClient in the
Registry or your accessKey and secretKey to access
the https://aws.amazon.com/dynamodb[Amazon's DynamoDB].

== Usage

=== Static credentials vs Default Credential Provider

You have the possibility of avoiding the usage of explicit static credentials, by specifying the useDefaultCredentialsProvider option and set it to true.

 - Java system properties - aws.accessKeyId and aws.secretKey
 - Environment variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.
 - Web Identity Token from AWS STS.
 - The shared credentials and config files.
 - Amazon ECS container credentials - loaded from the Amazon ECS if the environment variable AWS_CONTAINER_CREDENTIALS_RELATIVE_URI is set.
 - Amazon EC2 Instance profile credentials. 

For more information about this you can look at https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/credentials.html[AWS credentials documentation]

=== Message headers evaluated by the DDB producer

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbBatchItems` |`Map<String, KeysAndAttributes>` |A map of the table name and corresponding items to get by primary key.

|`CamelAwsDdbTableName` |`String` |Table Name for this operation.

|`CamelAwsDdbKey` |`Key` |The primary key that uniquely identifies each item in a table.

|`CamelAwsDdbReturnValues` |`String` |Use this parameter if you want to get the attribute name-value pairs
before or after they are modified(NONE, ALL_OLD, UPDATED_OLD, ALL_NEW,
UPDATED_NEW).

|`CamelAwsDdbUpdateCondition` |`Map<String, ExpectedAttributeValue>` |Designates an attribute for a conditional modification.

|`CamelAwsDdbAttributeNames` |`Collection<String>` |If attribute names are not specified then all attributes will be
returned.

|`CamelAwsDdbConsistentRead` |`Boolean` |If set to true, then a consistent read is issued, otherwise eventually
consistent is used.

|`CamelAwsDdbIndexName` |`String` |If set will be used as Secondary Index for Query operation.

|`CamelAwsDdbItem` |`Map<String, AttributeValue>` |A map of the attributes for the item, and must include the primary key
values that define the item.

|`CamelAwsDdbExactCount` |`Boolean` |If set to true, Amazon DynamoDB returns a total number of items that
match the query parameters, instead of a list of the matching items and
their attributes.

|`CamelAwsDdbKeyConditions` |`Map<String, Condition>` |This header specify the selection criteria for the
query, and merge together the two old headers *CamelAwsDdbHashKeyValue*
and *CamelAwsDdbScanRangeKeyCondition*

|`CamelAwsDdbStartKey` |`Key` |Primary key of the item from which to continue an earlier query.

|`CamelAwsDdbHashKeyValue` |`AttributeValue` |Value of the hash component of the composite primary key.

|`CamelAwsDdbLimit` |`Integer` |The maximum number of items to return.

|`CamelAwsDdbScanRangeKeyCondition` |`Condition` |A container for the attribute values and comparison operators to use for
the query.

|`CamelAwsDdbScanIndexForward` |`Boolean` |Specifies forward or backward traversal of the index.

|`CamelAwsDdbScanFilter` |`Map<String, Condition>` |Evaluates the scan results and returns only the desired values.

|`CamelAwsDdbUpdateValues` |`Map<String, AttributeValueUpdate>` |Map of attribute name to the new value and action for the update.
|=======================================================================

=== Message headers set during BatchGetItems operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbBatchResponse` |`Map<String,BatchResponse>` |Table names and the respective item attributes from the tables.

|`CamelAwsDdbUnprocessedKeys` |`Map<String,KeysAndAttributes>` |Contains a map of tables and their respective keys that were not
processed with the current response.
|=======================================================================

=== Message headers set during DeleteItem operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbAttributes` |`Map<String, AttributeValue>` |The list of attributes returned by the operation.
|=======================================================================

=== Message headers set during DeleteTable operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbProvisionedThroughput`| | 

|`ProvisionedThroughputDescription` | |The value of the ProvisionedThroughput property for this table

|`CamelAwsDdbCreationDate` |`Date` |Creation DateTime of this table.

|`CamelAwsDdbTableItemCount` |`Long` |Item count for this table.

|`CamelAwsDdbKeySchema` |`KeySchema` |The KeySchema that identifies the primary key for this table. 
*From Camel 2.16.0 the type of this header is List<KeySchemaElement> and not KeySchema*

|`CamelAwsDdbTableName` |`String` |The table name. 

|`CamelAwsDdbTableSize` |`Long` |The table size in bytes. 

|`CamelAwsDdbTableStatus` |`String` |The status of the table: CREATING, UPDATING, DELETING, ACTIVE
|=======================================================================

=== Message headers set during DescribeTable operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbProvisionedThroughput` |{\{ProvisionedThroughputDescription}} |The value of the ProvisionedThroughput property for this table

|`CamelAwsDdbCreationDate` |`Date` |Creation DateTime of this table.

|`CamelAwsDdbTableItemCount` |`Long` |Item count for this table.

|`CamelAwsDdbKeySchema` |{\{KeySchema}} |The KeySchema that identifies the primary key for this table.


|`CamelAwsDdbTableName` |`String` |The table name.

|`CamelAwsDdbTableSize` |`Long` |The table size in bytes.

|`CamelAwsDdbTableStatus` |`String` |The status of the table: CREATING, UPDATING, DELETING, ACTIVE

|`CamelAwsDdbReadCapacity` |`Long` |ReadCapacityUnits property of this table.

|`CamelAwsDdbWriteCapacity` |`Long` |WriteCapacityUnits property of this table.
|=======================================================================

=== Message headers set during GetItem operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbAttributes` |`Map<String, AttributeValue>` |The list of attributes returned by the operation.

|=======================================================================

=== Message headers set during PutItem operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbAttributes` |`Map<String, AttributeValue>` |The list of attributes returned by the operation.

|=======================================================================

=== Message headers set during Query operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbItems` |`List<java.util.Map<String,AttributeValue>>` |The list of attributes returned by the operation.

|`CamelAwsDdbLastEvaluatedKey` |`Key` |Primary key of the item where the query operation stopped, inclusive of
the previous result set.

|`CamelAwsDdbConsumedCapacity` |`Double` |The number of Capacity Units of the provisioned throughput of the table
consumed during the operation.

|`CamelAwsDdbCount` |`Integer` |Number of items in the response.
|=======================================================================

=== Message headers set during Scan operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbItems` |`List<java.util.Map<String,AttributeValue>>` |The list of attributes returned by the operation.

|`CamelAwsDdbLastEvaluatedKey` |`Key` |Primary key of the item where the query operation stopped, inclusive of
the previous result set.

|`CamelAwsDdbConsumedCapacity` |`Double` |The number of Capacity Units of the provisioned throughput of the table
consumed during the operation.

|`CamelAwsDdbCount` |`Integer` |Number of items in the response.

|`CamelAwsDdbScannedCount` |`Integer` |Number of items in the complete scan before any filters are applied.
|=======================================================================

=== Message headers set during UpdateItem operation

[width="100%",cols="10%,10%,80%",options="header",]
|=======================================================================
|Header |Type |Description

|`CamelAwsDdbAttributes` |`Map<String, AttributeValue>` |The list of attributes returned by the operation.

|=======================================================================

=== Advanced AmazonDynamoDB configuration

If you need more control over the `AmazonDynamoDB` instance
configuration you can create your own instance and refer to it from the
URI:

[source,java]
----------------------------------------------------
from("direct:start")
.to("aws2-ddb://domainName?amazonDDBClient=#client");
----------------------------------------------------

The `#client` refers to a `DynamoDbClient` in the
Registry.

== Supported producer operations

- BatchGetItems
- DeleteItem
- DeleteTable
- DescribeTable
- GetItem
- PutItem
- Query
- Scan
- UpdateItem
- UpdateTable

== Dependencies

Maven users will need to add the following dependency to their pom.xml.

*pom.xml*

[source,xml]
---------------------------------------
<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-aws2-ddb</artifactId>
    <version>${camel-version}</version>
</dependency>
---------------------------------------

where `$\{camel-version}` must be replaced by the actual version of Camel.


include::spring-boot:partial$starter.adoc[]
