NIFI-5022 This closes #2588. InvokeAWSGatewayApi processor

per review, simplify header building and remove new map
Per review:
- removed apache headers from 3rd party files per https://www.apache.org/legal/src-headers.html#3party
- referenced commit/repo in notice file
- created rat configuration to account for files without headers

Signed-off-by: joewitt <joewitt@apache.org>

Author: ottobackwards

NOTICE

@@ -64,4 +64,27 @@ This includes derived works from Apache Solr available under Apache Software Lic
 
 This includes derived works from Apache Hadoop available under Apache Software License V2. Portions of the code found in
   https://github.com/apache/hadoop/blob/release-2.7.3-RC2/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
-  The code can be found nifi-commons/nifi-security-utils/src/main/java/org/apache/nifi/security/krb/KeytabUser.java
+  The code can be found nifi-commons/nifi-security-utils/src/main/java/org/apache/nifi/security/krb/KeytabUser.java
+This includes derived works from apigateway-generic-java-sdk (ASLv2 licenced) project (https://github.com/rpgreen/apigateway-generic-java-sdk):
+  The derived work is adapted from
+    main/ca/ryangreen/apigateway/generic/
+      GenericApiGatewayClient.java
+      GenericApiGatewayClientBuilder.java
+      GenericApiGatewayException.java
+      GenericApiGatewayRequest.java
+      GenericApiGatewayRequestBuilder.java
+    test/ca/ryangreen/apigateway/generic/
+      GenericApiGatewayClientTest.java
+      LambdaMatcher.java
+  and can be found in the directories:
+    nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/../wag/client/
+      GenericApiGatewayClient.java
+      GenericApiGatewayClientBuilder.java
+      GenericApiGatewayException.java
+      GenericApiGatewayRequest.java
+      GenericApiGatewayRequestBuilder.java
+      Validate.java
+    nifi-nar-bundles/nifi-aws-bundle/nifi-aws-processors/src/test/../wag/
+      RequestMatcher.java
+      GetAWSGatewayApiTest.java
+

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/pom.xml

@@ -53,6 +53,11 @@
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-sqs</artifactId>
         </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.6</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
@@ -81,5 +86,19 @@
             <artifactId>nifi-proxy-configuration-api</artifactId>
         </dependency>
     </dependencies>
-
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.rat</groupId>
+                <artifactId>apache-rat-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <!-- 3rd party APL 2.0 code brought in, should not have headers -->
+                        <!--https://www.apache.org/legal/src-headers.html#3party-->
+                        <exclude>src/main/java/org/apache/nifi/processors/aws/wag/client/*.java</exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 </project>

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/AbstractAWSProcessor.java

@@ -156,11 +156,11 @@ public abstract class AbstractAWSProcessor<ClientType extends AmazonWebServiceCl
     private static final ProxySpec[] PROXY_SPECS = {ProxySpec.HTTP_AUTH};
     public static final PropertyDescriptor PROXY_CONFIGURATION_SERVICE = ProxyConfiguration.createProxyConfigPropertyDescriptor(true, PROXY_SPECS);
 
-    private static AllowableValue createAllowableValue(final Regions region) {
+    protected static AllowableValue createAllowableValue(final Regions region) {
         return new AllowableValue(region.getName(), AWSRegions.getRegionDisplayName(region.getName()));
     }
 
-    private static AllowableValue[] getAvailableRegions() {
+    protected static AllowableValue[] getAvailableRegions() {
         final List<AllowableValue> values = new ArrayList<>();
         for (final Regions region : Regions.values()) {
             values.add(createAllowableValue(region));

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/wag/AbstractAWSGatewayApiProcessor.java

@@ -0,0 +1,114 @@
+package org.apache.nifi.processors.aws.wag.client;
+
+import com.amazonaws.AmazonServiceException;
+import com.amazonaws.AmazonWebServiceClient;
+import com.amazonaws.ClientConfiguration;
+import com.amazonaws.DefaultRequest;
+import com.amazonaws.auth.AWS4Signer;
+import com.amazonaws.auth.AWSCredentialsProvider;
+import com.amazonaws.http.AmazonHttpClient;
+import com.amazonaws.http.ExecutionContext;
+import com.amazonaws.http.HttpMethodName;
+import com.amazonaws.http.HttpResponseHandler;
+import com.amazonaws.http.JsonResponseHandler;
+import com.amazonaws.internal.auth.DefaultSignerProvider;
+import com.amazonaws.protocol.json.JsonOperationMetadata;
+import com.amazonaws.protocol.json.SdkStructuredPlainJsonFactory;
+import com.amazonaws.regions.Region;
+import com.amazonaws.transform.JsonErrorUnmarshaller;
+import com.amazonaws.transform.JsonUnmarshallerContext;
+import com.amazonaws.transform.Unmarshaller;
+import com.fasterxml.jackson.databind.JsonNode;
+import java.io.InputStream;
+import java.net.URI;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class GenericApiGatewayClient extends AmazonWebServiceClient {
+    private static final String API_GATEWAY_SERVICE_NAME = "execute-api";
+    private static final String API_KEY_HEADER = "x-api-key";
+
+    private final JsonResponseHandler<GenericApiGatewayResponse> responseHandler;
+    private final HttpResponseHandler<AmazonServiceException> errorResponseHandler;
+    private final AWSCredentialsProvider credentials;
+    private String apiKey;
+    private final AWS4Signer signer;
+
+    GenericApiGatewayClient(ClientConfiguration clientConfiguration, String endpoint, Region region,
+                            AWSCredentialsProvider credentials, String apiKey, AmazonHttpClient httpClient) {
+        super(clientConfiguration);
+        setRegion(region);
+        setEndpoint(endpoint);
+        this.credentials = credentials;
+        this.apiKey = apiKey;
+        this.signer = new AWS4Signer();
+        this.signer.setServiceName(API_GATEWAY_SERVICE_NAME);
+        this.signer.setRegionName(region.getName());
+
+        final JsonOperationMetadata metadata = new JsonOperationMetadata().withHasStreamingSuccessResponse(false).withPayloadJson(false);
+        final Unmarshaller<GenericApiGatewayResponse, JsonUnmarshallerContext> responseUnmarshaller = in -> new GenericApiGatewayResponse(in.getHttpResponse());
+        this.responseHandler = SdkStructuredPlainJsonFactory.SDK_JSON_FACTORY.createResponseHandler(metadata, responseUnmarshaller);
+        JsonErrorUnmarshaller defaultErrorUnmarshaller = new JsonErrorUnmarshaller(GenericApiGatewayException.class, null) {
+            @Override
+            public AmazonServiceException unmarshall(JsonNode jsonContent) throws Exception {
+                return new GenericApiGatewayException(jsonContent.toString());
+            }
+        };
+        this.errorResponseHandler = SdkStructuredPlainJsonFactory.SDK_JSON_FACTORY.createErrorResponseHandler(
+                Collections.singletonList(defaultErrorUnmarshaller), null);
+
+        if (httpClient != null) {
+            super.client = httpClient;
+        }
+    }
+
+    public GenericApiGatewayResponse execute(GenericApiGatewayRequest request) {
+        return execute(request.getHttpMethod(), request.getResourcePath(), request.getHeaders(), request.getParameters(), request.getBody());
+    }
+
+    private GenericApiGatewayResponse execute(HttpMethodName method, String resourcePath, Map<String, String> headers, Map<String,List<String>> parameters, InputStream content) {
+        final ExecutionContext executionContext = buildExecutionContext();
+
+        DefaultRequest request = new DefaultRequest(API_GATEWAY_SERVICE_NAME);
+        request.setHttpMethod(method);
+        request.setContent(content);
+        request.setEndpoint(this.endpoint);
+        request.setResourcePath(resourcePath);
+        request.setHeaders(buildRequestHeaders(headers, apiKey));
+        if (parameters != null) {
+            request.setParameters(parameters);
+        }
+        return this.client.execute(request, responseHandler, errorResponseHandler, executionContext).getAwsResponse();
+    }
+
+    private ExecutionContext buildExecutionContext() {
+        final ExecutionContext executionContext = ExecutionContext.builder().withSignerProvider(
+                new DefaultSignerProvider(this, signer)).build();
+        executionContext.setCredentialsProvider(credentials);
+        executionContext.setSigner(signer);
+        return executionContext;
+    }
+
+    private Map<String, String> buildRequestHeaders(Map<String, String> headers, String apiKey) {
+        if (headers == null) {
+            headers = new HashMap<>();
+        }
+        if (apiKey != null) {
+            headers.put(API_KEY_HEADER, apiKey);
+        }
+        return headers;
+    }
+
+    public URI getEndpoint() {
+        return this.endpoint;
+    }
+
+    @Override
+    protected String getServiceNameIntern() {
+        return API_GATEWAY_SERVICE_NAME;
+    }
+}
+
+

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/wag/client/GenericApiGatewayClient.java

@@ -0,0 +1,76 @@
+package org.apache.nifi.processors.aws.wag.client;
+
+import com.amazonaws.ClientConfiguration;
+import com.amazonaws.auth.AWSCredentialsProvider;
+import com.amazonaws.http.AmazonHttpClient;
+import com.amazonaws.regions.Region;
+
+public class GenericApiGatewayClientBuilder {
+    private String endpoint;
+    private Region region;
+    private AWSCredentialsProvider credentials;
+    private ClientConfiguration clientConfiguration;
+    private String apiKey;
+    private AmazonHttpClient httpClient;
+
+    public GenericApiGatewayClientBuilder withEndpoint(String endpoint) {
+        this.endpoint = endpoint;
+        return this;
+    }
+
+    public GenericApiGatewayClientBuilder withRegion(Region region) {
+        this.region = region;
+        return this;
+    }
+
+    public GenericApiGatewayClientBuilder withClientConfiguration(ClientConfiguration clientConfiguration) {
+        this.clientConfiguration = clientConfiguration;
+        return this;
+    }
+
+    public GenericApiGatewayClientBuilder withCredentials(AWSCredentialsProvider credentials) {
+        this.credentials = credentials;
+        return this;
+    }
+
+    public GenericApiGatewayClientBuilder withApiKey(String apiKey) {
+        this.apiKey = apiKey;
+        return this;
+    }
+
+    public GenericApiGatewayClientBuilder withHttpClient(AmazonHttpClient client) {
+        this.httpClient = client;
+        return this;
+    }
+
+    public AWSCredentialsProvider getCredentials() {
+        return credentials;
+    }
+
+    public String getApiKey() {
+        return apiKey;
+    }
+
+    public AmazonHttpClient getHttpClient() {
+        return httpClient;
+    }
+
+    public String getEndpoint() {
+        return endpoint;
+    }
+
+    public Region getRegion() {
+        return region;
+    }
+
+    public ClientConfiguration getClientConfiguration() {
+        return clientConfiguration;
+    }
+
+    public GenericApiGatewayClient build() {
+        Validate.notEmpty(endpoint, "Endpoint");
+        Validate.notNull(region, "Region");
+        return new GenericApiGatewayClient(clientConfiguration, endpoint, region, credentials, apiKey, httpClient);
+    }
+
+}

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/wag/client/GenericApiGatewayClientBuilder.java

@@ -0,0 +1,13 @@
+package org.apache.nifi.processors.aws.wag.client;
+
+import com.amazonaws.AmazonServiceException;
+
+public class GenericApiGatewayException extends AmazonServiceException {
+    public GenericApiGatewayException(String errorMessage) {
+        super(errorMessage);
+    }
+
+    public GenericApiGatewayException(String errorMessage, Exception cause) {
+        super(errorMessage, cause);
+    }
+}

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/wag/client/GenericApiGatewayException.java

@@ -0,0 +1,45 @@
+package org.apache.nifi.processors.aws.wag.client;
+
+import com.amazonaws.http.HttpMethodName;
+import java.io.InputStream;
+import java.util.List;
+import java.util.Map;
+
+public class GenericApiGatewayRequest {
+
+    private final HttpMethodName httpMethod;
+    private final String resourcePath;
+    private final InputStream body;
+    private final Map<String, String> headers;
+    private final Map<String, List<String>> parameters;
+
+    public GenericApiGatewayRequest(HttpMethodName httpMethod, String resourcePath,
+                                    InputStream body, Map<String, String> headers,
+                                    Map<String, List<String>> parameters) {
+        this.httpMethod = httpMethod;
+        this.resourcePath = resourcePath;
+        this.body = body;
+        this.headers = headers;
+        this.parameters = parameters;
+    }
+
+    public HttpMethodName getHttpMethod() {
+        return httpMethod;
+    }
+
+    public String getResourcePath() {
+        return resourcePath;
+    }
+
+    public InputStream getBody() {
+        return body;
+    }
+
+    public Map<String, String> getHeaders() {
+        return headers;
+    }
+
+    public Map<String, List<String>> getParameters() {
+        return parameters;
+    }
+}

nifi-nar-bundles/nifi-aws-bundle/nifi-aws-abstract-processors/src/main/java/org/apache/nifi/processors/aws/wag/client/GenericApiGatewayRequest.java

@@ -0,0 +1,49 @@
+package org.apache.nifi.processors.aws.wag.client;
+
+import com.amazonaws.http.HttpMethodName;
+import java.io.InputStream;
+import java.util.List;
+import java.util.Map;
+
+public class GenericApiGatewayRequestBuilder {
+    private HttpMethodName httpMethod;
+    private String resourcePath;
+    private InputStream body;
+    private Map<String, String> headers;
+    private Map<String, List<String>> parameters;
+
+    public GenericApiGatewayRequestBuilder withHttpMethod(HttpMethodName name) {
+        httpMethod = name;
+        return this;
+    }
+
+    public GenericApiGatewayRequestBuilder withResourcePath(String path) {
+        resourcePath = path;
+        return this;
+    }
+
+    public GenericApiGatewayRequestBuilder withBody(InputStream content) {
+        this.body = content;
+        return this;
+    }
+
+    public GenericApiGatewayRequestBuilder withHeaders(Map<String, String> headers) {
+        this.headers = headers;
+        return this;
+    }
+
+    public GenericApiGatewayRequestBuilder withParameters(Map<String,List<String>> parameters) {
+        this.parameters = parameters;
+        return this;
+    }
+
+    public boolean hasBody() {
+        return this.body != null;
+    }
+
+    public GenericApiGatewayRequest build() {
+        Validate.notNull(httpMethod, "HTTP method");
+        Validate.notEmpty(resourcePath, "Resource path");
+        return new GenericApiGatewayRequest(httpMethod, resourcePath, body, headers, parameters);
+    }
+}