[STORM-3850] Collapse exceptions, remove unused variables/params, fix…

… spelling, etc

examples/storm-loadgen/src/main/java/org/apache/storm/loadgen/CaptureLoad.java

@@ -271,7 +271,8 @@ static TopologyLoadConf captureTopology(Nimbus.Iface client, TopologySummary top
         return new TopologyLoadConf(topologyName, savedTopoConf, spouts, bolts, streams);
     }
 
-    private static void addCpuMemToBuilders(Map<String, LoadCompConf.Builder> boltBuilders, Map<String, Map<String, Double>> boltResources) {
+    private static void addCpuMemToBuilders(Map<String, LoadCompConf.Builder> boltBuilders,
+                                            Map<String, Map<String, Double>> boltResources) {
         for (Map.Entry<String, Map<String, Double>> entry: boltResources.entrySet()) {
             LoadCompConf.Builder bd = boltBuilders.get(entry.getKey());
             if (bd != null) {

examples/storm-perf/src/main/java/org/apache/storm/perf/queuetest/JCQueuePerfTest.java

@@ -44,7 +44,8 @@ public static void main(String[] args) throws Exception {
     //private static void ackingProducerSimulation() {
     //    WaitStrategyPark ws = new WaitStrategyPark(100);
     //    StormMetricRegistry registry = new StormMetricRegistry();
-    //    JCQueue spoutQ = new JCQueue("spoutQ", "spoutQ", 1024, 0, 100, ws, "test", "test", Collections.singletonList(1000), 1000, registry);
+    //    JCQueue spoutQ = new JCQueue("spoutQ", "spoutQ", 1024, 0, 100, ws, "test", "test",
+    //        Collections.singletonList(1000), 1000, registry);
     //    JCQueue ackQ = new JCQueue("ackQ", "ackQ", 1024, 0, 100, ws, "test", "test", Collections.singletonList(1000), 1000, registry);
     //
     //    final AckingProducer ackingProducer = new AckingProducer(spoutQ, ackQ);

examples/storm-pmml-examples/src/main/java/org/apache/storm/pmml/JpmmlRunnerTestTopology.java

@@ -65,7 +65,7 @@ public class JpmmlRunnerTestTopology {
     private String blobKey;           // PMML Model downloaded from Blobstore - null if using File
     private String tplgyName = "test";
 
-    public static void main(String[] args) throws Exception {
+    public static void main(String[] args) {
         try {
             JpmmlRunnerTestTopology testTopology = new JpmmlRunnerTestTopology();
             testTopology.parseArgs(args);
@@ -77,10 +77,10 @@ public static void main(String[] args) throws Exception {
     }
 
     private void parseArgs(String[] args) {
-        if (Arrays.stream(args).anyMatch(option -> option.equals("-h"))) {
+        if (Arrays.asList(args).contains("-h")) {
             printUsage();
-        } else if (Arrays.stream(args).anyMatch(option -> option.equals("-f"))
-                && Arrays.stream(args).anyMatch(option -> option.equals("-b"))) {
+        } else if (Arrays.asList(args).contains("-f")
+                && Arrays.asList(args).contains("-b")) {
             System.out.println("Please specify only one option of [-b, -f]");
             printUsage();
         } else {
@@ -116,21 +116,25 @@ private void parseArgs(String[] args) {
     private void setDefaults() {
         if (blobKey == null) {  // blob key not specified, use file
             if (pmml == null) {
-                pmml = loadExample(pmml, PMML_MODEL_FILE);
+                pmml = loadExample(PMML_MODEL_FILE);
             }
         }
 
         if (rawInputs == null) {
-            rawInputs = loadExample(rawInputs, RAW_INPUTS_FILE);
+            rawInputs = loadExample(RAW_INPUTS_FILE);
         }
 
         if (tplgyName == null) {
             tplgyName = "pmmlPredictorLocal";
         }
     }
 
-    private File loadExample(File file, String example) {
+    private File loadExample(String example) {
+        File file;
         try (InputStream stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(example)) {
+            if (stream == null) {
+                throw new RuntimeException("Error loading example=" + example + ", stream is null");
+            }
             file = File.createTempFile("pmml-example", ".tmp");
             IOUtils.copy(stream, new FileOutputStream(file));
         } catch (IOException e) {
@@ -147,8 +151,8 @@ private static void printUsage() {
     }
 
     private void run() throws Exception {
-        System.out.println(String.format("Running topology using PMML model loaded from [%s] and raw input data loaded from [%s]",
-                blobKey != null ? "Blobstore with blob key [" + blobKey + "]" : pmml.getAbsolutePath(), rawInputs.getAbsolutePath()));
+        System.out.printf("Running topology using PMML model loaded from [%s] and raw input data loaded from [%s]%n",
+                blobKey != null ? "Blobstore with blob key [" + blobKey + "]" : pmml.getAbsolutePath(), rawInputs.getAbsolutePath());
         submitTopologyRemoteCluster(newTopology(), newConfig());
     }
 
@@ -171,7 +175,7 @@ private Config newConfig() {
         return config;
     }
 
-    private IRichBolt newBolt() throws Exception {
+    private IRichBolt newBolt() {
         final List<String> streams = Lists.newArrayList(Utils.DEFAULT_STREAM_ID, NON_DEFAULT_STREAM_ID);
         if (blobKey != null) {  // Load PMML Model from Blob store
             final ModelOutputs outFields = JpmmlModelOutputs.toStreams(blobKey, streams);

examples/storm-starter/src/jvm/org/apache/storm/starter/LambdaTopology.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -12,7 +12,6 @@
 
 package org.apache.storm.starter;
 
-import java.io.Serializable;
 import java.util.UUID;
 import org.apache.storm.Config;
 import org.apache.storm.topology.ConfigurableTopology;
@@ -42,10 +41,10 @@ protected int run(String[] args) throws Exception {
 
         builder.setSpout("spout1", () -> UUID.randomUUID().toString());
         builder.setBolt("bolt1", (tuple, collector) -> {
-            String[] parts = tuple.getStringByField("lambda").split("\\-");
+            String[] parts = tuple.getStringByField("lambda").split("-");
             collector.emit(new Values(prefix + parts[0] + suffix, tag));
         }, "strValue", "intValue").shuffleGrouping("spout1");
-        builder.setBolt("bolt2", tuple -> System.out.println(tuple)).shuffleGrouping("bolt1");
+        builder.setBolt("bolt2", System.out::println).shuffleGrouping("bolt1");
 
         Config conf = new Config();
         conf.setDebug(true);

external/storm-blobstore-migration/src/main/java/org/apache/storm/blobstore/MigrateBlobs.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -23,11 +23,8 @@
 import java.util.Map;
 
 import javax.security.auth.Subject;
-import javax.security.auth.login.LoginContext;
 
 import org.apache.storm.Config;
-import org.apache.storm.blobstore.BlobStore;
-import org.apache.storm.blobstore.LocalFsBlobStore;
 import org.apache.storm.generated.AuthorizationException;
 import org.apache.storm.generated.KeyAlreadyExistsException;
 import org.apache.storm.generated.KeyNotFoundException;
@@ -47,9 +44,8 @@ protected static void deleteAllBlobStoreKeys(BlobStore bs, Subject who) throws A
         }
     }
 
-    protected static void copyBlobStoreKeys(BlobStore bsFrom,
-            Subject whoFrom,
-            BlobStore bsTo, Subject whoTo) throws AuthorizationException,
+    protected static void copyBlobStoreKeys(BlobStore bsFrom, Subject whoFrom, BlobStore bsTo, Subject whoTo)
+        throws AuthorizationException,
             KeyAlreadyExistsException,
             IOException,
             KeyNotFoundException {
@@ -63,13 +59,12 @@ protected static void copyBlobStoreKeys(BlobStore bsFrom,
             System.out.println("DONE CREATING BLOB " + key);
         }
     }
-
-
+
     public static void main(String[] args) throws Exception {
         Map<String, Object> hdfsConf = Utils.readStormConfig();
 
         if (args.length < 2) {
-            System.out.println("Need at least 2 arguments, but have " + Integer.toString(args.length));
+            System.out.println("Need at least 2 arguments, but have " + args.length);
             System.out.println("migrate <local_blobstore_dir> <hdfs_blobstore_path> <hdfs_principal> <keytab>");
             System.out.println("Migrates blobs from LocalFsBlobStore to HdfsBlobStore");
             System.out.println("Example: migrate '/srv/storm' "
@@ -104,8 +99,7 @@ public static void main(String[] args) throws Exception {
 
         HdfsBlobStore hdfsBlobStore = new HdfsBlobStore();
         hdfsBlobStore.prepare(hdfsConf, null, null, null);
-
-
+
         /* LOOK AT LOCAL BLOBSTORE */
         System.out.println("Listing local blobstore keys.");
         MigratorMain.listBlobStoreKeys(lfsBlobStore, null);

external/storm-cassandra/src/main/java/org/apache/storm/cassandra/query/builder/ObjectMapperCqlStatementMapperBuilder.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -60,29 +60,29 @@ public ObjectMapperCqlStatementMapper build() {
                                                   codecs, udtClasses);
     }
 
-    public ObjectMapperCqlStatementMapperBuilder withCodecs(List<SerializableCallable<TypeCodec<?>>> codecProducer) {
-        this.codecProducers.addAll(codecProducer);
-        return this;
-    }
-
-    public ObjectMapperCqlStatementMapperBuilder withUdtCodecs(List<Class<?>> udtClass) {
-        this.udtClasses.addAll(udtClass);
-        return this;
-    }
-
-    public ObjectMapperCqlStatementMapperBuilder withTimestampField(String timestampField) {
-        this.timestampField = timestampField;
-        return this;
-    }
-
-    public ObjectMapperCqlStatementMapperBuilder withTtlField(String ttlField) {
-        this.ttlField = ttlField;
-        return this;
-    }
-
-    public ObjectMapperCqlStatementMapperBuilder withConsistencyLevelField(String consistencyLevelField) {
-        this.consistencyLevelField = consistencyLevelField;
-        return this;
-    }
+    //public ObjectMapperCqlStatementMapperBuilder withCodecs(List<SerializableCallable<TypeCodec<?>>> codecProducer) {
+    //    this.codecProducers.addAll(codecProducer);
+    //    return this;
+    //}
+    //
+    //public ObjectMapperCqlStatementMapperBuilder withUdtCodecs(List<Class<?>> udtClass) {
+    //    this.udtClasses.addAll(udtClass);
+    //    return this;
+    //}
+    //
+    //public ObjectMapperCqlStatementMapperBuilder withTimestampField(String timestampField) {
+    //    this.timestampField = timestampField;
+    //    return this;
+    //}
+    //
+    //public ObjectMapperCqlStatementMapperBuilder withTtlField(String ttlField) {
+    //    this.ttlField = ttlField;
+    //    return this;
+    //}
+    //
+    //public ObjectMapperCqlStatementMapperBuilder withConsistencyLevelField(String consistencyLevelField) {
+    //    this.consistencyLevelField = consistencyLevelField;
+    //    return this;
+    //}
 }
 

external/storm-elasticsearch/src/test/java/org/apache/storm/elasticsearch/common/EsConfigTest.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -17,23 +17,22 @@
  */
 package org.apache.storm.elasticsearch.common;
 
-import static org.junit.Assert.assertEquals;
-
-import org.apache.http.HttpHost;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import com.google.common.testing.NullPointerTester;
-import org.junit.jupiter.api.Assertions;
+import org.apache.http.HttpHost;
 import org.junit.jupiter.api.Test;
 
 public class EsConfigTest {
 
     @Test
-    public void urlsCannotBeEmpty() throws Exception {
-        Assertions.assertThrows(IllegalArgumentException.class, () -> new EsConfig(new String[] {}));
+    public void urlsCannotBeEmpty() {
+        assertThrows(IllegalArgumentException.class, () -> new EsConfig(new String[] {}));
     }
 
     @Test
-    public void constructorThrowsOnNull() throws Exception {
+    public void constructorThrowsOnNull() {
         new NullPointerTester().testAllPublicConstructors(EsConfig.class);
     }
 

external/storm-eventhubs/src/main/java/org/apache/storm/eventhubs/bolt/EventHubBolt.java

@@ -1,4 +1,4 @@
-/*******************************************************************************
+/*
  * 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
@@ -14,7 +14,7 @@
  * 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.eventhubs.bolt;
 
@@ -38,23 +38,22 @@
  */
 public class EventHubBolt extends BaseRichBolt {
     private static final long serialVersionUID = 1L;
-    private static final Logger logger = LoggerFactory
-        .getLogger(EventHubBolt.class);
+    private static final Logger logger = LoggerFactory.getLogger(EventHubBolt.class);
 
     protected OutputCollector collector;
     protected PartitionSender sender;
     protected EventHubClient ehClient;
     protected EventHubBoltConfig boltConfig;
 
-    public EventHubBolt(String connectionString, String entityPath) {
-        boltConfig = new EventHubBoltConfig(connectionString, entityPath);
-    }
-
-    public EventHubBolt(String userName, String password, String namespace,
-                        String entityPath, boolean partitionMode) {
-        boltConfig = new EventHubBoltConfig(userName, password, namespace,
-                                            entityPath, partitionMode);
-    }
+    //public EventHubBolt(String connectionString, String entityPath) {
+    //    boltConfig = new EventHubBoltConfig(connectionString, entityPath);
+    //}
+    //
+    //public EventHubBolt(String userName, String password, String namespace,
+    //                    String entityPath, boolean partitionMode) {
+    //    boltConfig = new EventHubBoltConfig(userName, password, namespace,
+    //                                        entityPath, partitionMode);
+    //}
 
     public EventHubBolt(EventHubBoltConfig config) {
         boltConfig = config;
@@ -97,12 +96,9 @@ public void execute(Tuple tuple) {
                 throw new EventHubException("ehclient is null");
             }
             collector.ack(tuple);
-        } catch (EventHubException ex) {
+        } catch (EventHubException | ServiceBusException ex) {
             collector.reportError(ex);
             collector.fail(tuple);
-        } catch (ServiceBusException e) {
-            collector.reportError(e);
-            collector.fail(tuple);
         }
     }
 
@@ -113,17 +109,15 @@ public void cleanup() {
                 sender.close().whenComplete((voidargs, error) -> {
                     try {
                         if (error != null) {
-                            logger.error("Exception during sender cleanup phase" + error.toString());
+                            logger.error("Exception during sender cleanup phase" + error);
                         }
                         ehClient.closeSync();
                     } catch (Exception e) {
-                        logger.error("Exception during ehclient cleanup phase" + e.toString());
+                        logger.error("Exception during ehclient cleanup phase" + e);
                     }
                 }).get();
-            } catch (InterruptedException e) {
-                logger.error("Exception occured during cleanup phase" + e.toString());
-            } catch (ExecutionException e) {
-                logger.error("Exception occured during cleanup phase" + e.toString());
+            } catch (InterruptedException | ExecutionException e) {
+                logger.error("Exception occurred during cleanup phase" + e);
             }
             logger.info("Eventhub Bolt cleaned up");
             sender = null;

external/storm-hdfs/src/test/java/org/apache/storm/hdfs/bolt/AvroGenericRecordBoltTest.java

@@ -1,4 +1,4 @@
-/**
+/*
  * 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
@@ -68,10 +68,9 @@ public class AvroGenericRecordBoltTest {
                                            + "\"fields\":[{\"name\":\"foo1\",\"type\":\"string\"},"
                                            + "{ \"name\":\"bar\", \"type\":\"string\", \"default\":\"baz\" },"
                                            + "{ \"name\":\"int1\", \"type\":\"int\" }]}";
-    private static Schema schema1;
-    private static Schema schema2;
     private static Tuple tuple1;
     private static Tuple tuple2;
+
     @Rule
     public MiniDFSClusterRule dfsClusterRule = new MiniDFSClusterRule(() -> {
         Configuration conf = new Configuration();
@@ -92,10 +91,10 @@ public class AvroGenericRecordBoltTest {
     @BeforeClass
     public static void setupClass() {
         Schema.Parser parser = new Schema.Parser();
-        schema1 = parser.parse(schemaV1);
+        Schema schema1 = parser.parse(schemaV1);
 
         parser = new Schema.Parser();
-        schema2 = parser.parse(schemaV2);
+        Schema schema2 = parser.parse(schemaV2);
 
         GenericRecordBuilder builder1 = new GenericRecordBuilder(schema1);
         builder1.set("foo1", "bar1");
@@ -110,8 +109,8 @@ public static void setupClass() {
 
     private static Tuple generateTestTuple(GenericRecord record) {
         TopologyBuilder builder = new TopologyBuilder();
-        GeneralTopologyContext topologyContext = new GeneralTopologyContext(builder.createTopology(),
-                                                                            new Config(), new HashMap(), new HashMap(), new HashMap(), "") {
+        GeneralTopologyContext topologyContext = new GeneralTopologyContext(builder.createTopology(), new Config(),
+            new HashMap<>(), new HashMap<>(), new HashMap<>(), "") {
             @Override
             public Fields getComponentOutputFields(String componentId, String streamId) {
                 return new Fields("record");