Chapter 4. AWS Kinesis
Both producer and consumer are supported
The AWS2 Kinesis component supports receiving messages from and sending messages to Amazon Kinesis (no Batch supported) service.
Prerequisites
You must have a valid Amazon Web Services developer account, and be signed up to use Amazon Kinesis. More information are available at AWS Kinesis.
4.1. URI Format
aws2-kinesis://stream-name[?options]
The stream needs to be created prior to it being used. You can append query options to the URI in the following format, ?options=value&option2=value&…
4.2. Configuring Options
Camel components are configured on two separate levels:
- component level
- endpoint level
4.2.1. Configuring Component Options
The component level is the highest level which holds general and common configurations that are inherited by the endpoints. For example a component may have security settings, credentials for authentication, urls for network connection and so forth.
Some components only have a few options, and others may have many. Because components typically have pre configured defaults that are commonly used, then you may often only need to configure a few options on a component; or none at all.
Configuring components can be done with the Component DSL, in a configuration file (application.properties|yaml), or directly with Java code.
4.2.2. Configuring Endpoint Options
Where you find yourself configuring the most is on endpoints, as endpoints often have many options, which allows you to configure what you need the endpoint to do. The options are also categorized into whether the endpoint is used as consumer (from) or as a producer (to), or used for both.
Configuring endpoints is most often done directly in the endpoint URI as path and query parameters. You can also use the Endpoint DSL as a type safe way of configuring endpoints.
A good practice when configuring options is to use Property Placeholders, which allows to not hardcode urls, port numbers, sensitive information, and other settings. In other words placeholders allows to externalize the configuration from your code, and gives more flexibility and reuse.
The following two sections lists all the options, firstly for the component followed by the endpoint.
4.3. Component Options
The AWS Kinesis component supports 22 options, which are listed below.
| Name | Description | Default | Type |
|---|---|---|---|
| amazonKinesisClient (common) | Autowired Amazon Kinesis client to use for all requests for this endpoint. | KinesisClient | |
| cborEnabled (common) | This option will set the CBOR_ENABLED property during the execution. | true | boolean |
| configuration (common) | Component configuration. | Kinesis2Configuration | |
| overrideEndpoint (common) | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option. | false | boolean |
| proxyHost (common) | To define a proxy host when instantiating the Kinesis client. | String | |
| proxyPort (common) | To define a proxy port when instantiating the Kinesis client. | Integer | |
| proxyProtocol (common) | To define a proxy protocol when instantiating the Kinesis client. Enum values:
| HTTPS | Protocol |
| region (common) | The region in which Kinesis Firehose 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(). | String | |
| trustAllCertificates (common) | If we want to trust all certificates in case of overriding the endpoint. | false | boolean |
| uriEndpointOverride (common) | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option. | String | |
| useDefaultCredentialsProvider (common) | Set whether the Kinesis client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | boolean |
| bridgeErrorHandler (consumer) | Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. | false | boolean |
| iteratorType (consumer) | Defines where in the Kinesis stream to start getting records. Enum values:
| TRIM_HORIZON | ShardIteratorType |
| maxResultsPerRequest (consumer) | Maximum number of records that will be fetched in each poll. | 1 | int |
| resumeStrategy (consumer) | Defines a resume strategy for AWS Kinesis. The default strategy reads the sequenceNumber if provided. | KinesisUserConfigurationResumeStrategy | KinesisResumeStrategy |
| sequenceNumber (consumer) | The sequence number to start polling from. Required if iteratorType is set to AFTER_SEQUENCE_NUMBER or AT_SEQUENCE_NUMBER. | String | |
| shardClosed (consumer) | Define what will be the behavior in case of shard closed. Possible value are ignore, silent and fail. In case of ignore a message will be logged and the consumer will restart from the beginning,in case of silent there will be no logging and the consumer will start from the beginning,in case of fail a ReachedClosedStateException will be raised. Enum values:
| ignore | Kinesis2ShardClosedStrategyEnum |
| shardId (consumer) | Defines which shardId in the Kinesis stream to get records from. | 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 |
| 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 |
4.4. Endpoint Options
The AWS Kinesis endpoint is configured using URI syntax:
aws2-kinesis:streamName
with the following path and query parameters:
4.4.1. Path Parameters (1 parameters)
| Name | Description | Default | Type |
|---|---|---|---|
| streamName (common) | Required Name of the stream. | String |
4.4.2. Query Parameters (38 parameters)
| Name | Description | Default | Type |
|---|---|---|---|
| amazonKinesisClient (common) | Autowired Amazon Kinesis client to use for all requests for this endpoint. | KinesisClient | |
| cborEnabled (common) | This option will set the CBOR_ENABLED property during the execution. | true | boolean |
| overrideEndpoint (common) | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option. | false | boolean |
| proxyHost (common) | To define a proxy host when instantiating the Kinesis client. | String | |
| proxyPort (common) | To define a proxy port when instantiating the Kinesis client. | Integer | |
| proxyProtocol (common) | To define a proxy protocol when instantiating the Kinesis client. Enum values:
| HTTPS | Protocol |
| region (common) | The region in which Kinesis Firehose 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(). | String | |
| trustAllCertificates (common) | If we want to trust all certificates in case of overriding the endpoint. | false | boolean |
| uriEndpointOverride (common) | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option. | String | |
| useDefaultCredentialsProvider (common) | Set whether the Kinesis client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | boolean |
| bridgeErrorHandler (consumer) | Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. | false | boolean |
| iteratorType (consumer) | Defines where in the Kinesis stream to start getting records. Enum values:
| TRIM_HORIZON | ShardIteratorType |
| maxResultsPerRequest (consumer) | Maximum number of records that will be fetched in each poll. | 1 | int |
| resumeStrategy (consumer) | Defines a resume strategy for AWS Kinesis. The default strategy reads the sequenceNumber if provided. | KinesisUserConfigurationResumeStrategy | KinesisResumeStrategy |
| sendEmptyMessageWhenIdle (consumer) | If the polling consumer did not poll any files, you can enable this option to send an empty message (no body) instead. | false | boolean |
| sequenceNumber (consumer) | The sequence number to start polling from. Required if iteratorType is set to AFTER_SEQUENCE_NUMBER or AT_SEQUENCE_NUMBER. | String | |
| shardClosed (consumer) | Define what will be the behavior in case of shard closed. Possible value are ignore, silent and fail. In case of ignore a message will be logged and the consumer will restart from the beginning,in case of silent there will be no logging and the consumer will start from the beginning,in case of fail a ReachedClosedStateException will be raised. Enum values:
| ignore | Kinesis2ShardClosedStrategyEnum |
| shardId (consumer) | Defines which shardId in the Kinesis stream to get records from. | String | |
| exceptionHandler (consumer (advanced)) | To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this option is not in use. By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored. | ExceptionHandler | |
| exchangePattern (consumer (advanced)) | Sets the exchange pattern when the consumer creates an exchange. Enum values:
| ExchangePattern | |
| pollStrategy (consumer (advanced)) | A pluggable org.apache.camel.PollingConsumerPollingStrategy allowing you to provide your custom implementation to control error handling usually occurred during the poll operation before an Exchange have been created and being routed in Camel. | PollingConsumerPollStrategy | |
| 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 |
| backoffErrorThreshold (scheduler) | The number of subsequent error polls (failed due some error) that should happen before the backoffMultipler should kick-in. | int | |
| backoffIdleThreshold (scheduler) | The number of subsequent idle polls that should happen before the backoffMultipler should kick-in. | int | |
| backoffMultiplier (scheduler) | To let the scheduled polling consumer backoff if there has been a number of subsequent idles/errors in a row. The multiplier is then the number of polls that will be skipped before the next actual attempt is happening again. When this option is in use then backoffIdleThreshold and/or backoffErrorThreshold must also be configured. | int | |
| delay (scheduler) | Milliseconds before the next poll. | 500 | long |
| greedy (scheduler) | If greedy is enabled, then the ScheduledPollConsumer will run immediately again, if the previous run polled 1 or more messages. | false | boolean |
| initialDelay (scheduler) | Milliseconds before the first poll starts. | 1000 | long |
| repeatCount (scheduler) | Specifies a maximum limit of number of fires. So if you set it to 1, the scheduler will only fire once. If you set it to 5, it will only fire five times. A value of zero or negative means fire forever. | 0 | long |
| runLoggingLevel (scheduler) | The consumer logs a start/complete log line when it polls. This option allows you to configure the logging level for that. Enum values:
| TRACE | LoggingLevel |
| scheduledExecutorService (scheduler) | Allows for configuring a custom/shared thread pool to use for the consumer. By default each consumer has its own single threaded thread pool. | ScheduledExecutorService | |
| scheduler (scheduler) | To use a cron scheduler from either camel-spring or camel-quartz component. Use value spring or quartz for built in scheduler. | none | Object |
| schedulerProperties (scheduler) | To configure additional properties when using a custom scheduler or any of the Quartz, Spring based scheduler. | Map | |
| startScheduler (scheduler) | Whether the scheduler should be auto started. | true | boolean |
| timeUnit (scheduler) | Time unit for initialDelay and delay options. Enum values:
| MILLISECONDS | TimeUnit |
| useFixedDelay (scheduler) | Controls if fixed delay or fixed rate is used. See ScheduledExecutorService in JDK for details. | true | boolean |
| accessKey (security) | Amazon AWS Access Key. | String | |
| secretKey (security) | Amazon AWS Secret Key. | String |
Required Kinesis component options
You have to provide the KinesisClient in the Registry with proxies and relevant credentials configured.
4.5. Batch Consumer
This component implements the Batch Consumer.
This allows you for instance to know how many messages exists in this batch and for instance let the Aggregator aggregate this number of messages.
4.6. Usage
4.6.1. 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 AWS credentials documentation
4.6.2. Message headers set by the Kinesis consumer
| Header | Type | Description |
|---|---|---|
|
|
| The sequence number of the record. This is represented as a String as it size is not defined by the API. If it is to be used as a numerical type then use |
|
|
| The time AWS assigned as the arrival time of the record. |
|
|
| Identifies which shard in the stream the data record is assigned to. |
4.6.3. AmazonKinesis configuration
You then have to reference the KinesisClient in the amazonKinesisClient URI option.
from("aws2-kinesis://mykinesisstream?amazonKinesisClient=#kinesisClient")
.to("log:out?showAll=true");4.6.4. Providing AWS Credentials
It is recommended that the credentials are obtained by using the DefaultAWSCredentialsProviderChain that is the default when creating a new ClientConfiguration instance, however, a different AWSCredentialsProvider can be specified when calling createClient(…).
4.6.5. Message headers used by the Kinesis producer to write to Kinesis. The producer expects that the message body is a byte[].
| Header | Type | Description |
|---|---|---|
|
|
| The PartitionKey to pass to Kinesis to store this record. |
|
|
| Optional paramter to indicate the sequence number of this record. |
4.6.6. Message headers set by the Kinesis producer on successful storage of a Record
| Header | Type | Description |
|---|---|---|
|
|
| The sequence number of the record, as defined in Response Syntax |
|
|
| The shard ID of where the Record was stored |
4.7. Dependencies
Maven users will need to add the following dependency to their pom.xml.
pom.xml
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-aws2-kinesis</artifactId>
<version>${camel-version}</version>
</dependency>
where 3.14.2 must be replaced by the actual version of Camel.
4.8. Spring Boot Auto-Configuration
When using aws2-kinesis with Spring Boot make sure to use the following Maven dependency to have support for auto configuration:
<dependency> <groupId>org.apache.camel.springboot</groupId> <artifactId>camel-aws2-kinesis-starter</artifactId> </dependency>
The component supports 40 options, which are listed below.
| Name | Description | Default | Type |
|---|---|---|---|
| camel.component.aws2-kinesis-firehose.access-key | Amazon AWS Access Key. | String | |
| camel.component.aws2-kinesis-firehose.amazon-kinesis-firehose-client | Amazon Kinesis Firehose client to use for all requests for this endpoint. The option is a software.amazon.awssdk.services.firehose.FirehoseClient type. | FirehoseClient | |
| camel.component.aws2-kinesis-firehose.autowired-enabled | 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 |
| camel.component.aws2-kinesis-firehose.cbor-enabled | This option will set the CBOR_ENABLED property during the execution. | true | Boolean |
| camel.component.aws2-kinesis-firehose.configuration | Component configuration. The option is a org.apache.camel.component.aws2.firehose.KinesisFirehose2Configuration type. | KinesisFirehose2Configuration | |
| camel.component.aws2-kinesis-firehose.enabled | Whether to enable auto configuration of the aws2-kinesis-firehose component. This is enabled by default. | Boolean | |
| camel.component.aws2-kinesis-firehose.lazy-start-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 |
| camel.component.aws2-kinesis-firehose.operation | The operation to do in case the user don’t want to send only a record. | KinesisFirehose2Operations | |
| camel.component.aws2-kinesis-firehose.override-endpoint | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option. | false | Boolean |
| camel.component.aws2-kinesis-firehose.proxy-host | To define a proxy host when instantiating the Kinesis Firehose client. | String | |
| camel.component.aws2-kinesis-firehose.proxy-port | To define a proxy port when instantiating the Kinesis Firehose client. | Integer | |
| camel.component.aws2-kinesis-firehose.proxy-protocol | To define a proxy protocol when instantiating the Kinesis Firehose client. | Protocol | |
| camel.component.aws2-kinesis-firehose.region | The region in which Kinesis Firehose 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(). | String | |
| camel.component.aws2-kinesis-firehose.secret-key | Amazon AWS Secret Key. | String | |
| camel.component.aws2-kinesis-firehose.trust-all-certificates | If we want to trust all certificates in case of overriding the endpoint. | false | Boolean |
| camel.component.aws2-kinesis-firehose.uri-endpoint-override | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option. | String | |
| camel.component.aws2-kinesis-firehose.use-default-credentials-provider | Set whether the Kinesis Firehose client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | Boolean |
| camel.component.aws2-kinesis.access-key | Amazon AWS Access Key. | String | |
| camel.component.aws2-kinesis.amazon-kinesis-client | Amazon Kinesis client to use for all requests for this endpoint. The option is a software.amazon.awssdk.services.kinesis.KinesisClient type. | KinesisClient | |
| camel.component.aws2-kinesis.autowired-enabled | 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 |
| camel.component.aws2-kinesis.bridge-error-handler | Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored. | false | Boolean |
| camel.component.aws2-kinesis.cbor-enabled | This option will set the CBOR_ENABLED property during the execution. | true | Boolean |
| camel.component.aws2-kinesis.configuration | Component configuration. The option is a org.apache.camel.component.aws2.kinesis.Kinesis2Configuration type. | Kinesis2Configuration | |
| camel.component.aws2-kinesis.enabled | Whether to enable auto configuration of the aws2-kinesis component. This is enabled by default. | Boolean | |
| camel.component.aws2-kinesis.iterator-type | Defines where in the Kinesis stream to start getting records. | ShardIteratorType | |
| camel.component.aws2-kinesis.lazy-start-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 |
| camel.component.aws2-kinesis.max-results-per-request | Maximum number of records that will be fetched in each poll. | 1 | Integer |
| camel.component.aws2-kinesis.override-endpoint | Set the need for overidding the endpoint. This option needs to be used in combination with uriEndpointOverride option. | false | Boolean |
| camel.component.aws2-kinesis.proxy-host | To define a proxy host when instantiating the Kinesis client. | String | |
| camel.component.aws2-kinesis.proxy-port | To define a proxy port when instantiating the Kinesis client. | Integer | |
| camel.component.aws2-kinesis.proxy-protocol | To define a proxy protocol when instantiating the Kinesis client. | Protocol | |
| camel.component.aws2-kinesis.region | The region in which Kinesis Firehose 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(). | String | |
| camel.component.aws2-kinesis.resume-strategy | Defines a resume strategy for AWS Kinesis. The default strategy reads the sequenceNumber if provided. The option is a org.apache.camel.component.aws2.kinesis.consumer.KinesisResumeStrategy type. | KinesisResumeStrategy | |
| camel.component.aws2-kinesis.secret-key | Amazon AWS Secret Key. | String | |
| camel.component.aws2-kinesis.sequence-number | The sequence number to start polling from. Required if iteratorType is set to AFTER_SEQUENCE_NUMBER or AT_SEQUENCE_NUMBER. | String | |
| camel.component.aws2-kinesis.shard-closed | Define what will be the behavior in case of shard closed. Possible value are ignore, silent and fail. In case of ignore a message will be logged and the consumer will restart from the beginning,in case of silent there will be no logging and the consumer will start from the beginning,in case of fail a ReachedClosedStateException will be raised. | Kinesis2ShardClosedStrategyEnum | |
| camel.component.aws2-kinesis.shard-id | Defines which shardId in the Kinesis stream to get records from. | String | |
| camel.component.aws2-kinesis.trust-all-certificates | If we want to trust all certificates in case of overriding the endpoint. | false | Boolean |
| camel.component.aws2-kinesis.uri-endpoint-override | Set the overriding uri endpoint. This option needs to be used in combination with overrideEndpoint option. | String | |
| camel.component.aws2-kinesis.use-default-credentials-provider | Set whether the Kinesis client should expect to load credentials through a default credentials provider or to expect static credentials to be passed in. | false | Boolean |
