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https://issues.apache.org/jira/browse/NIFI-3449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15860784#comment-15860784
]
ASF GitHub Bot commented on NIFI-3449:
--------------------------------------
Github user jvwing commented on a diff in the pull request:
https://github.com/apache/nifi/pull/1482#discussion_r100471403
--- Diff:
nifi-nar-bundles/nifi-gcp-bundle/nifi-gcp-processors/src/main/java/org/apache/nifi/processors/gcp/credentials/factory/strategies/AbstractBooleanCredentialsStrategy.java
---
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.nifi.processors.gcp.credentials.factory.strategies;
+
+import org.apache.nifi.components.PropertyDescriptor;
+import org.apache.nifi.components.ValidationContext;
+import org.apache.nifi.components.ValidationResult;
+import
org.apache.nifi.processors.gcp.credentials.factory.CredentialsStrategy;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+
+/**
+ * Partial implementation of CredentialsStrategy to provide support for
credential strategies specified by
+ * a single boolean property.
+ */
+public abstract class AbstractBooleanCredentialsStrategy extends
AbstractCredentialsStrategy {
--- End diff --
I think we need an override for `canCreatePrimaryCredential()` that parses
the boolean property value. As-is, I believe it fails in the following
scenario:
1. Create a GCPCredentialsControllerService
2. Edit properties to set "Use Application Default Credentials" to `true`.
Click Apply.
3. Edit properties to set "Use Application Default Credentials" to `false`,
and "Use Compute Engine Credentials" to `true`. Click Apply.
The controller service is now in an invalid state because "Use Application
Default Credentials" thinks it's in a viable state with a non-null property
value, without parsing the property to understand "false" means no.
> Create Google Cloud Platform/Google Cloud Storage Processors
> ------------------------------------------------------------
>
> Key: NIFI-3449
> URL: https://issues.apache.org/jira/browse/NIFI-3449
> Project: Apache NiFi
> Issue Type: New Feature
> Components: Extensions
> Reporter: Gene Peters
> Labels: features
>
> Hi all,
> We had a need in our production deployments to interact with Google Cloud
> Storage. At the time, NIFI-2809 hadn't seen much movement, and after applying
> the patch I found that the configuration was too specific for my needs (it's
> hardcoded to use "Application Default" credentials, everything uploaded to
> GCS is uploaded with the "public" ACL, etc). So I created a series of
> Processors / Controller Services based off of the AWS NiFi library, and would
> like to contribute them.
> Features:
> * All credentialing is handled by a controller service, allowing multiple
> processors to use the same service / credentials
> * An Abstract processor is provided which forms the basis for all GCP related
> processors.
> * The standard Google Cloud Storage operations are supported, very similarly
> to the AWS S3 processors: ListGCSBucket, DeleteGCSObject, FetchGCSObject,
> PutGCSObject
> * Everything is documented and unit tested.
> * I've also provided integration tests, but they're disabled by default (as
> they require Google Cloud credentials). To run them, use the flag
> {{skipGCPIntegrationTests=false}}
> Todo:
> * The GCP Java library's ReadChannel objects implement the "restorable"
> interface, which allows for state saving / checkpointing. I'd really like to
> leverage this with the State support that NiFi provides, but it would require
> serializing / deserializing the object.
> I'm going to be submitting this as a pull request through GitHub.
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