Add a token provider and custom scopes example

CHANGES.md

@@ -1,5 +1,9 @@
 ### Changes
 
+#### 0.4.1
+
+- Add a token provider and custom scopes example
+
 #### 0.4.0
 
 - track the version of the client

examples/build.gradle

@@ -12,6 +12,7 @@ repositories {
 
 dependencies {
  compile 'net.dehora.nakadi:nakadi-java-client:0.4.0'
+ //compile 'net.dehora.nakadi:nakadi-java-zign:0.4.0' // enable when published in jcenter
  compile 'org.slf4j:slf4j-api:1.7.21'
  compile 'ch.qos.logback:logback-classic:1.1.7'
 // compile 'net.dehora.nakadi:nakadi-java-metrics:0.0.0'

examples/src/main/java/nakadi/examples/oauth/MyTokenProvider.java

@@ -0,0 +1,20 @@
+package nakadi.examples.oauth;
+
+import java.util.Optional;
+import nakadi.TokenProvider;
+
+public class MyTokenProvider implements TokenProvider {
+
+ /**
+ * @return a value suitable for use in an Authorization header, or null to suppress the
+ * Authorization header being set
+ */
+ @Override public Optional<String> authHeaderValue(String scope) {
+
+ if("gordian-blade-scope".equals(scope)) {
+ return Optional.of("code-gate-token");
+ }
+
+ return Optional.of("icebreaker-uid-token");
+ }
+}

examples/src/main/java/nakadi/examples/oauth/OAuthScopesMain.java

@@ -0,0 +1,41 @@
+package nakadi.examples.oauth;
+
+import nakadi.BusinessEventMapped;
+import nakadi.EventMetadata;
+import nakadi.EventResource;
+import nakadi.NakadiClient;
+import nakadi.examples.events.PriorityRequisition;
+
+public class OAuthScopesMain {
+
+ public static void main(String[] args) {
+
+ String baseURI = "http://localhost:" + 9080;
+
+ NakadiClient client = NakadiClient.newBuilder()
+ .baseURI(baseURI)
+ /*
+ Configure the client with a token provider. All scopes are sent to this TokenProvider
+ per request to be resolved to tokens. Because it's per request, providers can refresh
+ in the background.
+ */
+ .tokenProvider(new MyTokenProvider())
+ .build();
+
+ BusinessEventMapped<PriorityRequisition> event = new BusinessEventMapped<PriorityRequisition>()
+ .metadata(new EventMetadata())
+ .data(new PriorityRequisition("22"));
+
+ EventResource events = client.resources().events();
+
+ /*
+ You can set the oauth scope on most requests using the scope() option.
+ This allows for custom or tenant level scopes to be used (in the future).
+ Otherwise the default scopes defined in the Nakadi API definition are used.
+ */
+ events
+ .scope("gordian-blade-scope")
+ .send("priority-requisition-biz", event);
+
+ }
+}