Merge pull request #39 from spring-cloud/27-eureka

Eureka Support

README.md

@@ -212,6 +212,17 @@ Disable Property: `org.springframework.cloud.bindings.boot.wavefront.enable`
 | `management.metrics.export.wavefront.api-token` | `{secret/api-token}`
 | `management.metrics.export.wavefront.uri` | `{secret/uri}`
 
+### Eureka
+Kind: `Eureka`
+Disable Property: `org.springframework.cloud.bindings.boot.eureka.enable`
+
+| Property | Value
+| -------- | ------------------
+| `eureka.client.oauth2.client-id` | `{secret/client-id}`
+| `eureka.client.oauth2.access-token-uri` | `{secret/access-token-uri}`
+| `eureka.client.region` | `default`
+| `eureka.client.serviceUrl.defaultZone` | `{secret/uri}/eureka/`
+
 ## License
 This buildpack is released under version 2.0 of the [Apache License][a].
 

src/main/java/org/springframework/cloud/bindings/boot/EurekaBindingsPropertiesProcessor.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.bindings.boot;
+
+import org.springframework.cloud.bindings.Binding;
+import org.springframework.cloud.bindings.Bindings;
+import org.springframework.core.env.Environment;
+
+import java.util.Map;
+
+import static org.springframework.cloud.bindings.boot.Guards.isKindEnabled;
+
+/**
+ * An implementation of {@link BindingsPropertiesProcessor} that detects {@link Binding}s of kind: {@value KIND}.
+ */
+final class EurekaBindingsPropertiesProcessor implements BindingsPropertiesProcessor {
+    /**
+     * The {@link Binding} kind that this processor is interested in: {@value}.
+     **/
+    public static final String KIND = "Eureka";
+
+    @Override
+    public void process(Environment environment, Bindings bindings, Map<String, Object> properties) {
+        if (!isKindEnabled(environment, KIND)) {
+            return;
+        }
+
+        bindings.filterBindings(KIND).forEach(binding -> {
+            MapMapper map = new MapMapper(binding.getSecret(), properties);
+
+            map.from("client-id").to("eureka.client.oauth2.client-id");
+            map.from("access-token-uri").to("eureka.client.oauth2.access-token-uri");
+            map.from("access-token-uri").to("eureka.client.oauth2.access-token-uri");
+            map.from("uri").to("eureka.client.serviceUrl.defaultZone",
+                    (uri) -> String.format("%s/eureka/", uri)
+            );
+
+            properties.put("eureka.client.region", "default");
+        });
+
+    }
+}

src/main/resources/META-INF/spring.factories

@@ -19,4 +19,5 @@ org.springframework.cloud.bindings.boot.BindingsPropertiesProcessor=\
   org.springframework.cloud.bindings.boot.RabbitMqBindingsPropertiesProcessor, \
   org.springframework.cloud.bindings.boot.RedisBindingsPropertiesProcessor, \
   org.springframework.cloud.bindings.boot.SqlServerBindingsPropertiesProcessor, \
-  org.springframework.cloud.bindings.boot.WavefrontBindingsPropertiesProcessor
+  org.springframework.cloud.bindings.boot.WavefrontBindingsPropertiesProcessor, \
+  org.springframework.cloud.bindings.boot.EurekaBindingsPropertiesProcessor

src/test/java/org/springframework/cloud/bindings/boot/EurekaBindingsPropertiesProcessorTest.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.bindings.boot;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.cloud.bindings.Binding;
+import org.springframework.cloud.bindings.Bindings;
+import org.springframework.cloud.bindings.FluentMap;
+import org.springframework.mock.env.MockEnvironment;
+
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.HashMap;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.cloud.bindings.boot.EurekaBindingsPropertiesProcessor.KIND;
+
+@DisplayName("Eureka BindingsPropertiesProcessor")
+final class EurekaBindingsPropertiesProcessorTest {
+
+    private final Bindings bindings = new Bindings(
+            new Binding("test-name", Paths.get("test-path"),
+                    Collections.singletonMap("kind", KIND),
+                    new FluentMap()
+                            .withEntry("uri", "test-uri")
+                            .withEntry("client-id", "test-client-id")
+                            .withEntry("client-secret", "test-client-secret")
+                            .withEntry("access-token-uri", "test-access-token-uri")
+            )
+    );
+
+    private final MockEnvironment environment = new MockEnvironment();
+
+    private final HashMap<String, Object> properties = new HashMap<>();
+
+    @Test
+    @DisplayName("contributes properties")
+    void test() {
+        new EurekaBindingsPropertiesProcessor().process(environment, bindings, properties);
+        assertThat(properties)
+                .containsEntry("eureka.client.region", "default")
+                .containsEntry("eureka.client.oauth2.client-id", "test-client-id")
+                .containsEntry("eureka.client.oauth2.access-token-uri", "test-access-token-uri")
+                .containsEntry("eureka.client.serviceUrl.defaultZone", "test-uri/eureka/");
+    }
+
+    @Test
+    @DisplayName("can be disabled")
+    void disabled() {
+        environment.setProperty("org.springframework.cloud.bindings.boot.eureka.enable", "false");
+
+        new KafkaBindingsPropertiesProcessor().process(environment, bindings, properties);
+
+        assertThat(properties).isEmpty();
+    }
+
+}