iam: implement doCreateIdentity for GCP

iam/iam-client/src/main/java/com/salesforce/multicloudj/iam/client/IamClient.java

@@ -44,15 +44,15 @@
  * client.attachInlinePolicy(policy, "123456789012", "us-west-2", "my-bucket");
  * </pre>
  */
-public class IamClient {
-    protected AbstractIam<?> iam;
+public class IamClient implements AutoCloseable {
+    protected AbstractIam iam;
 
     /**
      * Constructor for IamClient with IamClientBuilder.
      *
      * @param iam The abstract IAM driver used to back this client for implementation.
      */
-    protected IamClient(AbstractIam<?> iam) {
+    protected IamClient(AbstractIam iam) {
         this.iam = iam;
     }
 
@@ -194,13 +194,18 @@ public String getIdentity(String identityName, String tenantId, String region) {
         }
     }
 
+    @Override
+    public void close() throws Exception {
+        this.iam.close();
+    }
+
     /**
      * Builder class for IamClient.
      */
     public static class IamClientBuilder {
         protected String region;
         protected URI endpoint;
-        protected AbstractIam<?> iam;
+        protected AbstractIam iam;
         protected AbstractIam.Builder<?, ?> iamBuilder;
 
         /**

iam/iam-client/src/main/java/com/salesforce/multicloudj/iam/client/ProviderSupplier.java

@@ -22,13 +22,13 @@ private ProviderSupplier() {
      */
     static AbstractIam.Builder<?, ?> findProviderBuilder(String providerId) {
         ServiceLoader<AbstractIam> services = ServiceLoader.load(AbstractIam.class);
-        ImmutableSet.Builder<AbstractIam<?>> builder = ImmutableSet.builder();
-        for (AbstractIam<?> service : services) {
+        ImmutableSet.Builder<AbstractIam> builder = ImmutableSet.builder();
+        for (AbstractIam service : services) {
             builder.add(service);
         }
-        Iterable<AbstractIam<?>> all = builder.build();
+        Iterable<AbstractIam> all = builder.build();
 
-        for (AbstractIam<?> provider : all) {
+        for (AbstractIam provider : all) {
             if (provider.getProviderId().equals(providerId)) {
                 return createBuilderInstance(provider);
             }
@@ -43,7 +43,7 @@ private ProviderSupplier() {
      * @return The AbstractIam.Builder for the provider.
      * @throws RuntimeException if the builder creation fails.
      */
-    private static AbstractIam.Builder<?, ?> createBuilderInstance(AbstractIam<?> provider) {
+    private static AbstractIam.Builder<?, ?> createBuilderInstance(AbstractIam provider) {
         try {
             return (AbstractIam.Builder<?, ?>) provider.getClass().getMethod("builder").invoke(provider);
         } catch (Exception e) {

iam/iam-client/src/main/java/com/salesforce/multicloudj/iam/driver/AbstractIam.java

@@ -20,7 +20,7 @@
  * and policies across different cloud providers including AWS IAM, GCP IAM, and
  * AliCloud RAM.
  */
-public abstract class AbstractIam<T extends AbstractIam<T>> implements Provider, Identity {
+public abstract class AbstractIam implements Provider, Identity, AutoCloseable {
     private final String providerId;
     protected final String region;
     protected final CredentialsOverrider credentialsOverrider;
@@ -62,7 +62,7 @@ public String getProviderId() {
      * @param <A> The concrete AbstractIam implementation type.
      * @param <T> The concrete Builder implementation type.
      */
-    public abstract static class Builder<A extends AbstractIam<?>, T extends Builder<A, T>> implements Provider.Builder {
+    public abstract static class Builder<A extends AbstractIam, T extends Builder<A, T>> implements Provider.Builder {
         @Getter
         protected String region;
         @Getter

iam/iam-client/src/main/java/com/salesforce/multicloudj/iam/driver/Identity.java

@@ -87,5 +87,11 @@ String createIdentity(String identityName, String description, String tenantId,
      * @return identity information as a JSON string
      */
     String getIdentity(String identityName, String tenantId, String region);
+
+    /**
+     * Closes resources and connections associated with this IAM driver.
+     * This method closes the IAM client if it was created.
+     */
+    void close();
 }