Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1185#discussion_r55275531
--- Diff: storm-core/src/jvm/org/apache/storm/daemon/StormCommon.java ---
@@ -0,0 +1,604 @@
+/**
+ * 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.daemon;
+
+import com.codahale.metrics.MetricRegistry;
+import org.apache.storm.Config;
+import org.apache.storm.Constants;
+import org.apache.storm.Thrift;
+import org.apache.storm.cluster.IStormClusterState;
+import org.apache.storm.daemon.metrics.MetricsUtils;
+import org.apache.storm.daemon.metrics.reporters.PreparableReporter;
+import org.apache.storm.generated.*;
+import org.apache.storm.generated.StormBase;
+import org.apache.storm.metric.EventLoggerBolt;
+import org.apache.storm.metric.MetricsConsumerBolt;
+import org.apache.storm.metric.SystemBolt;
+import org.apache.storm.security.auth.IAuthorizer;
+import org.apache.storm.task.IBolt;
+import org.apache.storm.testing.NonRichBoltTracker;
+import org.apache.storm.utils.ConfigUtils;
+import org.apache.storm.utils.IPredicate;
+import org.apache.storm.utils.ThriftTopologyUtils;
+import org.apache.storm.utils.Utils;
+import org.json.simple.JSONValue;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.*;
+
+public class StormCommon {
+ // A singleton instance allows us to mock delegated static methods in
our
+ // tests by subclassing.
+ private static StormCommon _instance = new StormCommon();
+
+ /**
+ * Provide an instance of this class for delegates to use. To mock out
+ * delegated methods, provide an instance of a subclass that overrides
the
+ * implementation of the delegated method.
+ * @param common a StormCommon instance
+ * @return the previously set instance
+ */
+ public static StormCommon setInstance(StormCommon common) {
+ StormCommon oldInstance = _instance;
+ _instance = common;
+ return oldInstance;
+ }
+
+ private static final Logger LOG =
LoggerFactory.getLogger(StormCommon.class);
+
+ public static final String ACKER_COMPONENT_ID =
Acker.ACKER_COMPONENT_ID;
+ public static final String ACKER_INIT_STREAM_ID =
Acker.ACKER_INIT_STREAM_ID;
+ public static final String ACKER_ACK_STREAM_ID =
Acker.ACKER_ACK_STREAM_ID;
+ public static final String ACKER_FAIL_STREAM_ID =
Acker.ACKER_FAIL_STREAM_ID;
+
+ public static final String SYSTEM_STREAM_ID = "__system";
+
+ public static final String EVENTLOGGER_COMPONENT_ID = "__eventlogger";
+ public static final String EVENTLOGGER_STREAM_ID = "__eventlog";
+
+ public static void startMetricsReporter(PreparableReporter report, Map
conf) {
+ report.prepare(new MetricRegistry(), conf);
+ report.start();
+ LOG.info("Started statistics report plugin...");
+ }
+
+ public static void startMetricsReporters(Map conf) {
+ List<PreparableReporter> reporters =
MetricsUtils.getPreparableReporters(conf);
+ for (PreparableReporter reporter : reporters) {
+ startMetricsReporter(reporter, conf);
+ }
+ }
+
+ public static String getTopologyNameById(String topologyId) {
+ String topologyName = null;
+ try {
+ topologyName = topologyIdToName(topologyId);
+ } catch (InvalidTopologyException e) {
+ LOG.error("Invalid topologyId=" + topologyId);
+ }
+ return topologyName;
+ }
+
+ /**
+ * Convert topologyId to topologyName. TopologyId =
topoloygName-counter-timeStamp
+ *
+ * @param topologyId
+ * @return
+ */
+ public static String topologyIdToName(String topologyId) throws
InvalidTopologyException {
+ String ret = null;
+ int index = topologyId.lastIndexOf('-');
+ if (index != -1 && index > 2) {
+ index = topologyId.lastIndexOf('-', index - 1);
+ if (index != -1 && index > 0)
+ ret = topologyId.substring(0, index);
+ else
+ throw new InvalidTopologyException(topologyId + " is not a
valid topologyId");
+ } else
+ throw new InvalidTopologyException(topologyId + " is not a
valid topologyId");
+ return ret;
+ }
+
+ public static String getStormId(IStormClusterState stormClusterState,
final String topologyName) {
+ List<String> activeTopologys = stormClusterState.activeStorms();
+ IPredicate pred = new IPredicate<String>() {
+ @Override
+ public boolean test(String obj) {
+ return obj != null ?
getTopologyNameById(obj).equals(topologyName) : false;
+ }
+ };
+ return Utils.findOne(pred, activeTopologys);
+ }
+
+ public static Map<String, StormBase> topologyBases(IStormClusterState
stormClusterState) {
+ return _instance.topologyBasesImpl(stormClusterState);
+ }
+
+ protected Map<String, StormBase> topologyBasesImpl(IStormClusterState
stormClusterState) {
+ List<String> activeTopologys = stormClusterState.activeStorms();
+ Map<String, StormBase> stormBases = new HashMap<String,
StormBase>();
+ if (activeTopologys != null) {
+ for (String topologyId : activeTopologys) {
+ StormBase base = stormClusterState.stormBase(topologyId,
null);
+ if (base != null) {
+ stormBases.put(topologyId, base);
+ }
+ }
+ }
+ return stormBases;
+ }
+
+ public static void validateDistributedMode(Map conf) {
+ if (ConfigUtils.isLocalMode(conf)) {
+ throw new IllegalArgumentException("Cannot start server in
local mode!");
+ }
+ }
+
+ private static void validateIds(StormTopology topology) throws
InvalidTopologyException {
+ List<String> componentIds = new ArrayList<String>();
+
+ for (StormTopology._Fields field : Thrift.getTopologyFields()) {
+ if (ThriftTopologyUtils.isWorkerHook(field) == false) {
+ Object value = topology.getFieldValue(field);
+ if (value != null) {
--- End diff --
Is this ever really null? I don't see the null check even implicitly in
the clojure code, if it is ever null I the clojure code would throw an NPE.
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