Github user ottobackwards commented on a diff in the pull request:
https://github.com/apache/metron/pull/856#discussion_r158588686
--- Diff:
metron-stellar/stellar-common/src/main/java/org/apache/metron/stellar/common/utils/validation/StellarZookeeperBasedValidator.java
---
@@ -0,0 +1,106 @@
+/*
+ *
+ * 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.metron.stellar.common.utils.validation;
+
+import static
org.apache.metron.stellar.common.shell.StellarShell.ERROR_PROMPT;
+
+import java.lang.invoke.MethodHandles;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import org.apache.commons.lang.NullArgumentException;
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.metron.stellar.common.StellarProcessor;
+import org.atteo.classindex.ClassIndex;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class StellarZookeeperBasedValidator implements StellarValidator {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+ private static final String FAILED_COMPILE = "Failed to compile";
+ private CuratorFramework client;
+
+ public StellarZookeeperBasedValidator(CuratorFramework client) throws
NullArgumentException {
+ if (client == null) {
+ throw new NullArgumentException("client");
+ }
+ this.client = client;
+ }
+
+
+ @Override
+ public Iterable<ValidationResult> validate(Optional<LineWriter> writer) {
+ // discover all the StellarConfigurationProvider
+ Set<StellarConfigurationProvider> providerSet = new HashSet<>();
+
+ for (Class<?> c :
ClassIndex.getSubclasses(StellarConfigurationProvider.class,
--- End diff --
The idea is that not only can we not know the details of the classes that
hold the rules, but also, that stellar may be hosted by other things than
metron, that 'know' how to provide those configurations.
The problem with this isn't the discovery per se, but in that it is not
correct given it's purpose and the implementation
---
