STORM-3512 Empty implementation for the MetricStore. (#3152)
* STORM-3512 Empty implementation for the MetricStore. Intended to be use in the config to disable monitoring.
diff --git a/storm-server/src/main/java/org/apache/storm/metricstore/NoOpMetricStore.java b/storm-server/src/main/java/org/apache/storm/metricstore/NoOpMetricStore.java
new file mode 100644
index 0000000..c9f67c1
--- /dev/null
+++ b/storm-server/src/main/java/org/apache/storm/metricstore/NoOpMetricStore.java
@@ -0,0 +1,40 @@
+/**
+ * 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.storm.metricstore;
+
+import java.util.Map;
+import org.apache.storm.metric.StormMetricsRegistry;
+
+@SuppressWarnings("unused")
+public class NoOpMetricStore implements MetricStore {
+
+ @Override
+ public void prepare(Map<String, Object> config, StormMetricsRegistry metricsRegistry) {}
+
+ @Override
+ public void insert(Metric metric) { }
+
+ @Override
+ public boolean populateValue(Metric metric) {
+ return true;
+ }
+
+ @Override
+ public void close() { }
+
+ @Override
+ public void scan(FilterOptions filter, ScanCallback scanCallback) { }
+}
+
+
+
+
