DDB Component
Available as of Camel 2.10
The DynamoDB component supports storing and retrieving data from/to Amazon's DynamoDB service.
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You must have a valid Amazon Web Services developer account, and be signed up to use Amazon DynamoDB. More information are available at Amazon DynamoDB. |
URI Format
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aws-ddb://domainName[?options] |
You can append query options to the URI in the following format, ?options=value&option2=value&...
URI Options
Name | Default Value | Context | Description |
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amazonDDBClient | | Producer | Reference to a |
accessKey | | Producer | Amazon AWS Access Key |
secretKey | | Producer | Amazon AWS Secret Key |
amazonDdbEndpoint | | Producer | The region with which the AWS-DDB client wants to work with. |
tableName | | Producer | The name of the table currently worked with. |
readCapacity | | Producer | The provisioned throughput to reserve for reading resources from your table |
writeCapacity | | Producer | The provisioned throughput to reserved for writing resources to your table |
consistentRead | | Producer | Determines whether or not strong consistency should be enforced when data is read. |
operation | | Producer | Valid values are BatchGetItems, DeleteItem, DeleteTable, DescribeTable, GetItem, PutItem, Query, Scan, UpdateItem, UpdateTable. |
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You have to provide the amazonDDBClient in the Registry or your accessKey and secretKey to access the Amazon's DynamoDB. |
Usage
Message headers evaluated by the DDB producer
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{div:class=confluenceTableSmall} || 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. | | {{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. | | {{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. | {div} |
Message headers set during BatchGetItems operation
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{div:class=confluenceTableSmall} || 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. | {div} |
Message headers set during DeleteItem operation
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{div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsDdbAttributes}} | {{Map<String, AttributeValue>}} | The list of attributes returned by the operation. | {div} |
Message headers set during DeleteTable operation
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{div:class=confluenceTableSmall} || 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 | {div} |
Message headers set during DescribeTable operation
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{div:class=confluenceTableSmall} || 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. | {div} |
Message headers set during GetItem operation
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{div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsDdbAttributes}} | {{Map<String, AttributeValue>}} | The list of attributes returned by the operation. | {div} |
Message headers set during PutItem operation
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{div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsDdbAttributes}} | {{Map<String, AttributeValue>}} | The list of attributes returned by the operation. | {div} |
Message headers set during Query operation
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{div:class=confluenceTableSmall} || 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. | {div} |
Message headers set during Scan operation
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{div:class=confluenceTableSmall} || 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. | {div} |
Message headers set during UpdateItem operation
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{div:class=confluenceTableSmall} || Header || Type || Description || | {{CamelAwsDdbAttributes}} | {{Map<String, AttributeValue>}} | The list of attributes returned by the operation. | {div} |
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:
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from("direct:start") .to("aws-ddb://domainName?amazonDDBClient=#client"); |
The #client
refers to a AmazonDynamoDB
in the Registry.
For example if your Camel Application is running behind a firewall:
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AWSCredentials awsCredentials = new BasicAWSCredentials("myAccessKey", "mySecretKey"); ClientConfiguration clientConfiguration = new ClientConfiguration(); clientConfiguration.setProxyHost("http://myProxyHost"); clientConfiguration.setProxyPort(8080); AmazonDynamoDB client = new AmazonDynamoDBClient(awsCredentials, clientConfiguration); registry.bind("client", client); |
Dependencies
Maven users will need to add the following dependency to their pom.xml.
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<dependency> <groupId>org.apache.camel</groupId> <artifactId>camel-aws</artifactId> <version>${camel-version}</version> </dependency> |
where ${camel-version
} must be replaced by the actual version of Camel (2.10 or higher).
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