CustomerServiceImpl.java

AmazonEventBridge client = AmazonEventBridgeClient.builder()
        .withRegion(Regions.US_EAST_1)
        .withCredentials(new DefaultAWSCredentialsProviderChain())
        .build();

PutEventsRequestEntry requestEntry = new PutEventsRequestEntry();
requestEntry.withSource("customer-service")  //this needs to match the event pattern defined in step 4 below
        .withDetailType("customer-created-detail-type")  //this needs to match the event pattern defined in step 4 below
        .withDetail(toJson(customerWasCreated)) //this converts the event object into JSON string
        .withEventBusName("test-event-bus"); //this needs to match the custom event bus name created in step 4 below
PutEventsRequest request = new PutEventsRequest();
request.withEntries(requestEntry);

PutEventsResult result = client.putEvents(request); //AmazonEventBridgeClient puts the event onto the event bus