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Riptide: Spring Boot Starter

Riptide: Spring Boot Starter is a library that seamlessly integrates various HTTP client-side tools in the easiest and convenient way possible. It solves a recurring problem of bootstrapping and wiring different libraries together whenever interaction with a remote service is required. Spinning up new clients couldn't get any easier!

Technology stack: Spring Boot
Status: Beta

Example

riptide.clients:
  example:
    base-url: http://example.com
    connections:
      connect-timeout: 150 milliseconds
      socket-timeout: 100 milliseconds
      time-to-live: 30 seconds
      max-per-route: 16
    retry:
      enabled: true
      fixed-delay: 50 milliseconds
      max-retries: 5
    circuit-breaker:
      enabled: true
      failure-threshold: 3 out of 5
      delay: 30 seconds
      success-threshold: 5 out of 5
    caching:
      enabled: true
      shared: false
      max-cache-entries: 1000
    tracing:
      enabled: true
      tags:
        peer.service: example

@Autowired
@Qualifier("example")
private Http example;

Features

Seamless integration of:
- Riptide
- Logbook
- OpenTracing Toolbox
- Jackson 2
- HttpClient
- Failsafe via Riptide: Failsafe
- Micrometer via Riptide: Micrometer
- SOAP via Riptide: SOAP
Spring Boot Auto Configuration
Automatically integrates and supports:
- Transient fault detection via Riptide: Faults
- HTTP JSON Streaming via Riptide: Stream
- Timeouts via Riptide: Failsafe
- Platform IAM OAuth tokens via Riptide: Auth
SSL certificate pinning
Sensible defaults

Dependencies

Java 8
Spring Boot 2
Riptide
- Core
- (Apache) HTTP Client
- Compression
- Backup (optional)
- Failsafe (optional)
- Faults (optional)
- Logbook (optional)
- Micrometer (optional)
- Timeouts (optional)
- SOAP (optional)
Tracer (optional)

Installation

Add the following dependency to your project:

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-spring-boot-starter</artifactId>
    <version>${riptide.version}</version>
</dependency>

Optional Dependencies

You will need to add declare the following dependencies, in order to enable some integrations and/or features:

Failsafe integration

Required for retry, circuit-breaker, backup-request and timeout support. Timeout is not to be confused with connect-timeout and socket-timeout, those are supported out of the box.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-failsafe</artifactId>
    <version>${riptide.version}</version>
</dependency>

Transient Fault detection

Required when transient-fault-detection is enabled.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-faults</artifactId>
    <version>${riptide.version}</version>
</dependency>

SOAP support

Required when soap is enabled.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-soap</artifactId>
    <version>${riptide.version}</version>
</dependency>

Logbook integration

Required when logging is enabled.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-logbook</artifactId>
    <version>${riptide.version}</version>
</dependency>
<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>logbook-spring-boot-autoconfigure</artifactId>
    <version>${logbook.version}</version>
</dependency>

Authorization support

Required for auth support.

Registers a special AuthorizationProvider that built for Zalando's Platform IAM which provides OAuth2 tokens as files in a mounted directory. See Zalando Platform IAM Integration for more details.

Registering a custom AuthorizationPlugin or AuthorizationProvider will override the default. Setting auth.enabled: true is still required in that case.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-auth</artifactId>
    <version>${riptide.version}</version>
</dependency>

Micrometer integration

Required when metrics is enabled.

Will activate Micrometer metrics support for:

requests
thread pools
connection pools
retries
circuit breaker

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-micrometer</artifactId>
    <version>${riptide.version}</version>
</dependency>

Please be aware that Micrometer, by default, doesn't expose to /metrics. Consult #401 for details how to bypass this.

Caching

Required when caching is enabled.

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient-cache</artifactId>
    <version>${httpclient.version}</version>
</dependency>

Tracing

Required when tracing is enabled.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>riptide-opentracing</artifactId>
    <version>${riptide.version}</version>
</dependency>
<dependency>
    <groupId>io.opentracing.contrib</groupId>
    <artifactId>opentracing-concurrent</artifactId>
    <version>${opentracing-concurrent.version}</version>
</dependency>

`X-Flow-ID`

Required when propagate-flow-id is enabled.

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>opentracing-flowid-starter</artifactId>
    <version>${opentracing-toolbox.version}</version>
</dependency>

Configuration

You can now define new clients and override default configuration in your application.yml:

riptide:
  defaults:
    auth:
      credentials-directory: /secrets
    tracing:
      enabled: true
      tags:
        account: ${CDP_TARGET_INFRASTRUCTURE_ACCOUNT}
        zone: ${CDP_TARGET_REGION}
        artifact_version: ${CDP_BUILD_VERSION}
        deployment_id: ${CDP_DEPLOYMENT_ID}
  clients:
    example:
      base-url: http://example.com
      connections:
        connect-timeout: 150 milliseconds
        socket-timeout: 100 milliseconds
        time-to-live: 30 seconds
        max-per-route: 16
      threads:
        min-size: 4
        max-size: 16
        keep-alive: 1 minnute
        queue-size: 0
      auth:
        enabled: true
      transient-fault-detection.enabled: true
      stack-trace-preservation.enabled: true
      retry:
        enabled: true
        fixed-delay: 50 milliseconds
        max-retries: 5
        max-duration: 2 second
        jitter: 25 milliseconds
      circuit-breaker:
        enabled: true
        failure-threshold: 3 out of 5
        delay: 30 seconds
        success-threshold: 5 out of 5
      backup-request:
        enabled: true
        delay: 75 milliseconds
      timeouts:
        enabled: true
        global: 500 milliseconds
      caching:
        enabled: true
        shared: true
        directory: /var/cache/http
        max-object-size: 8192 # kilobytes
        max-cache-entries: 1000
        heuristic:
          enabled: true
          coefficient: 0.1
          default-life-time: 10 minutes
      tracing:
        tags:
          peer.service: example
        propagate-flow-id: true

Clients are identified by a Client ID, for instance example in the sample above. You can have as many clients as you want.

Reference

For a complete overview of available properties, they type and default value please refer to the following table:

Configuration	Data type	Default / Comment
`riptide`
`├── defaults`
`│ ├── auth`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── credentials-directory`	`Path`	`/meta/credentials`
`│ ├── backup-request`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── delay`	`TimeSpan`	no delay
`│ ├── caching`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── shared`	`boolean`	`false`
`│ │ ├── directory`	`String`	none, in-memory caching by default
`│ │ ├── max-object-size`	`int`	`8192`
`│ │ ├── max-cache-entries`	`int`	`1000`
`│ │ └── heuristic`		If max age was not specified by the server
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── coefficient`	`double`	`0.1`
`│ │ └── default-life-time`	`TimeSpan`	`0 seconds`, disabled
`│ ├── certificate-pinning`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── keystore`
`│ │ ├── path`	`Path`	none
`│ │ └── password`	`String`	none
`│ ├── chaos`
`│ │ ├── latency`
`│ │ │ ├── enabled`	`boolean`	`false`
`│ │ │ ├── probability`	`double`	`0.01`
`│ │ │ └── delay`	`TimeSpan`	`1 second`
`│ │ ├── exceptions`
`│ │ │ ├── enabled`	`boolean`	`false`
`│ │ │ └── probability`	`double`	`0.001`
`│ │ └── error-responses`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── probability`	`double`	`0.001`
`│ │ └── status-codes`	`int[]`	`[500, 503]`
`│ ├── circuit-breaker`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── failure-threshold`	`Ratio`	none
`│ │ ├── delay`	`TimeSpan`	no delay
`│ │ └── success-threshold`	`Ratio`	`failure-threshold`
`│ ├── connections`
`│ │ ├── lease-request-timeout`	`TimeSpan`	`1 second`
`│ │ ├── connect-timeout`	`TimeSpan`	`5 seconds`
`│ │ ├── socket-timeout`	`TimeSpan`	`5 seconds`
`│ │ ├── time-to-live`	`TimeSpan`	`30 seconds`
`│ │ ├── max-per-route`	`int`	`20`
`│ │ ├── max-total`	`int`	`20` (or at least `max-per-route`)
`│ │ └── mode`	`String`	`streaming` (alternative is `buffering`)
`│ ├── logging`
`│ │ └── enabled`	`boolean`	`false`
`│ ├── metrics`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── tags`	`Map`	none
`│ ├── request-compression`
`│ │ └── enabled`	`boolean`	`false`
`│ ├── retry`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── fixed-delay`	`TimeSpan`	none, mutually exclusive to `backoff`
`│ │ ├── backoff`		none, mutually exclusive to `fixed-delay`
`│ │ │ ├── enabled`	`boolean`	`false`
`│ │ │ ├── delay`	`TimeSpan`	none, requires `backoff.max-delay`
`│ │ │ ├── max-delay`	`TimeSpan`	none, requires `backoff.delay`
`│ │ │ └── delay-factor`	`double`	`2.0`
`│ │ ├── max-retries`	`int`	none
`│ │ ├── max-duration`	`TimeSpan`	`5 seconds`
`│ │ ├── jitter-factor`	`double`	none, mutually exclusive to `jitter`
`│ │ └── jitter`	`TimeSpan`	none, mutually exclusive to `jitter-factor`
`│ ├── soap`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── protocol`	`String`	`1.1` (possible other value: `1.2`)
`│ ├── stack-trace-preservation`
`│ │ └── enabled`	`boolean`	`true`
`│ ├── threads`
`│ │ ├── enabled`	`boolean`	`true`
`│ │ ├── min-size`	`int`	`1`
`│ │ ├── max-size`	`int`	same as `connections.max-total`
`│ │ ├── keep-alive`	`TimeSpan`	`1 minute`
`│ │ └── queue-size`	`int`	`0` (no queue)
`│ ├── timeouts`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ └── global`	`TimeSpan`	none
`│ ├── tracing`
`│ │ ├── enabled`	`boolean`	`false`
`│ │ ├── tags`	`Map`	none
`│ │ └── propagate-flow-id`	`boolean`	`false`
`│ ├── transient-fault-detection`
`│ │ └── enabled`	`boolean`	`false`
`│ └── url-resolution`	`String`	`rfc`
`└── clients`
`└── <id>`	`String`
`├── backup-request`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── delay`	`TimeSpan`	see `defaults`
`├── base-url`	`URI`	none
`├── caching`		see `defaults`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── shared`	`boolean`	see `defaults`
`│ ├── directory`	`String`	see `defaults`
`│ ├── max-object-size`	`int`	see `defaults`
`│ ├── max-cache-entries`	`int`	see `defaults`
`│ └── heuristic`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── coefficient`	`double`	see `defaults`
`│ └── default-life-time`	`TimeSpan`	see `defaults`
`├── certificate-pinning`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── keystore`
`│ ├── path`	`Path`	see `defaults`
`│ └── password`	`String`	see `defaults`
`├── chaos`
`│ ├── latency`
`│ │ ├── enabled`	`boolean`	see `defaults`
`│ │ ├── probability`	`double`	see `defaults`
`│ │ └── delay`	`TimeSpan`	see `defaults`
`│ ├── exceptions`
`│ │ ├── enabled`	`boolean`	see `defaults`
`│ │ └── probability`	`double`	see `defaults`
`│ └── error-responses`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── probability`	`double`	see `defaults`
`│ └── status-codes`	`int[]`	see `defaults`
`├── circuit-breaker`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── failure-threshold`	`Ratio`	see `defaults`
`│ ├── delay`	`TimeSpan`	see `defaults`
`│ └── success-threshold`	`Ratio`	see `defaults`
`├── connections`
`│ ├── lease-request-timeout`	`TimeSpan`	see `defaults`
`│ ├── connect-timeout`	`TimeSpan`	see `defaults`
`│ ├── socket-timeout`	`TimeSpan`	see `defaults`
`│ ├── time-to-live`	`TimeSpan`	see `defaults`
`│ ├── max-per-route`	`int`	see `defaults`
`│ └── max-total`	`int`	see `defaults`
`├── logging`
`│ └── enabled`	`boolean`	see `defaults`
`├── metrics`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── tags`	`Map`	see `defaults`
`├── auth`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── credentials-directory`	`Path`	see `defaults`
`├── request-compression`
`│ └── enabled`	`boolean`	see `defaults`
`├── retry`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── fixed-delay`	`TimeSpan`	see `defaults`
`│ ├── backoff`
`│ │ ├── enabled`	`boolean`	see `defaults`
`│ │ ├── delay`	`TimeSpan`	see `defaults`
`│ │ ├── max-delay`	`TimeSpan`	see `defaults`
`│ │ └── delay-factor`	`double`	see `defaults`
`│ ├── max-retries`	`int`	see `defaults`
`│ ├── max-duration`	`TimeSpan`	see `defaults`
`│ ├── jitter-factor`	`double`	see `defaults`
`│ └── jitter`	`TimeSpan`	see `defaults`
`├── soap`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── protocol`	`String`	see `defaults`
`├── stack-trace-preservation`
`│ └── enabled`	`boolean`	see `defaults`
`├── threads`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── min-size`	`int`	see `defaults`
`│ ├── max-size`	`int`	see `defaults`
`│ ├── keep-alive`	`TimeSpan`	see `defaults`
`│ └── queue-size`	`int`	see `defaults`
`├── timeouts`
`│ ├── enabled`	`boolean`	see `defaults`
`│ └── global`	`TimeSpan`	see `defaults`
`├── tracing`
`│ ├── enabled`	`boolean`	see `defaults`
`│ ├── tags`	`Map`	see `defaults`
`│ └── propagate-flow-id`	`boolean`	see `defaults`
`├── transient-fault-detection`
`│ └── enabled`	`boolean`	see `defaults`
`└── url-resolution`	`String`	see `defaults`

Beware that starting with Spring Boot 1.5.x the property resolution for environment variables changes and properties like REST_CLIENTS_EXAMPLE_BASEURL no longer work. As an alternative applications can use the SPRING_APPLICATION_JSON:

export SPRING_APPLICATION_JSON='{
   "riptide.clients.example.base-url": ".."
}'

Usage

After configuring your clients, as shown in the last section, you can now easily inject them:

@Autowired
@Qualifier("example")
private Http example;

All beans that are created for each client use the Client ID, in this case example, as their qualifier.

Besides Http, you can also alternatively inject any of the following types per client directly:

RestOperations
AsyncRestOperations
ClientHttpRequestFactory
HttpClient
ClientHttpMessageConverters

Certificate Pinning

A client can be configured to only connect to trusted hosts (see Certificate Pinning) by configuring the certificate-pinning key. Use keystore.path to refer to a JKS keystore on the classpath/filesystem and (optionally) specify the passphrase via keystore.password.

You can generate a keystore using the JDK's keytool:

./keytool -importcert -file some-cert.crt -keystore my.keystore -alias "<some-alias>"

Customization

For every client that is defined in your configuration the following beans will be created and wired.

Legend

green: managed beans
blue: optionally managed beans
yellow: managed singleton beans, i.e. shared across clients
red: mandatory dependency
grey: optional dependency

Bean Graph

Plugins

Converters

Interceptors

Every single bean in the graph can optionally be replaced by your own, custom version of it. Beans can only be overridden by name, not by type. As an example, the following code would add XML support to the example client:

@Bean
@Qualifier("example")
public ClientHttpMessageConverters exampleHttpMessageConverters() {
    return new ClientHttpMessageConverters(singletonList(new Jaxb2RootElementHttpMessageConverter()));
}

The following table shows all beans with their respective name (for the example client) and type:

Bean Name	Bean Type
`exampleHttp`	`Http`
`exampleBaseURL`	`BaseURL` (effectively a `Supplier<URI>`)
`exampleClientHttpRequestFactory`	`ClientHttpRequestFactory`
`exampleHttpMessageConverters`	`ClientHttpMessageConverters`
`exampleHttpClient`	`HttpClient`
`exampleExecutorService`	`ExecutorService`
`exampleFailsafePlugin`	`FailsafePlugin`
`exampleMicrometerPlugin`	`MicrometerPlugin`
`exampleOriginalStackTracePlugin`	`OriginalStackTracePlugin`
`examplePlugin`	`Plugin` (optional, additional custom plugin)
`exampleScheduledExecutorService`	`ScheduledExecutorService`
`exampleRetryPolicy`	`RetryPolicy`
`exampleCircuitBreaker`	`CircuitBreaker`
`exampleRetryListener`	`RetryListener`
`exampleFaultClassifier`	`FaultClassifier`
`exampleCircuitBreakerListener`	`CircuitBreakerListener`
`exampleAuthorizationProvider`	`AuthorizationProvider`

If you override a bean then all of its dependencies (see the graph), will not be registered, unless required by some other bean.

In case you need more than one custom plugin, please use Plugin.composite(Plugin...).

Testing

Similar to Spring Boot's @RestClientTest, @RiptideClientTest is provided. This annotation allows for convenient testing of Riptide Http clients.

@Component
public class GatewayService {

    @Autowired
    @Qualifier("example")
    private Http http;

    void remoteCall() {
        http.get("/bar").dispatch(status(), on(OK).call(pass())).join();
    }
}

@RunWith(SpringRunner.class)
@RiptideClientTest(GatewayService.class)
final class RiptideTest {

    @Autowired
    private GatewayService client;

    @Autowired
    private MockRestServiceServer server;

    @Test
    public void shouldAutowireMockedHttp()  {
        server.expect(requestTo("https://example.com/bar")).andRespond(withSuccess());
        client.remoteCall();
        server.verify();
    }
}

Beware that all components of a client below and including ClientHttpRequestFactory are replaced by mocks. In addition, if enabled the AuthorizationProvider will default to a mock implementation for tests.

Getting Help

If you have questions, concerns, bug reports, etc., please file an issue in this repository's Issue Tracker.

Getting Involved/Contributing

To contribute, simply make a pull request and add a brief description (1-2 sentences) of your addition or change. For more details, check the contribution guidelines.

Alternatives

In case you don't want to use this Spring Boot Starter you always have the possibility to wire everything up by hand. Feel free to take a look at this example.

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riptide-spring-boot-starter

riptide-spring-boot-starter

README.md

Riptide: Spring Boot Starter

Example

Features

Dependencies

Installation

Optional Dependencies

Failsafe integration

Transient Fault detection

SOAP support

Logbook integration

Authorization support

Micrometer integration

Caching

Tracing

`X-Flow-ID`

Configuration

Reference

Usage

Certificate Pinning

Customization

Bean Graph

Plugins

Converters

Interceptors

Testing

Getting Help

Getting Involved/Contributing

Alternatives

Files

riptide-spring-boot-starter

Directory actions

More options

Directory actions

More options

Latest commit

History

riptide-spring-boot-starter

Folders and files

parent directory

README.md

Riptide: Spring Boot Starter

Example

Features

Dependencies

Installation

Optional Dependencies

Failsafe integration

Transient Fault detection

SOAP support

Logbook integration

Authorization support

Micrometer integration

Caching

Tracing

X-Flow-ID

Configuration

Reference

Usage

Certificate Pinning

Customization

Bean Graph

Plugins

Converters

Interceptors

Testing

Getting Help

Getting Involved/Contributing

Alternatives

`X-Flow-ID`