build: fixes bytecode level and updates build versions

activemq-client/pom.xml

@@ -34,11 +34,6 @@
          as the former uses javax.jms and latter jakarta.jms. It could be
          better to make an activemq-client6 module. -->
     <activemq.version>5.18.3</activemq.version>
-
-    <!-- CI should run the "release" profile during tests to ensure no 1.8
-         features are in use. -->
-    <!-- activemq is Java 1.6 bytecode -->
-    <main.signature.artifact>java16</main.signature.artifact>
   </properties>
 
   <dependencies>
@@ -67,7 +62,9 @@
       <id>release</id>
       <properties>
         <!-- activemq is Java 1.6 bytecode -->
-        <main.java.version>1.6</main.java.version>
+        <maven.compiler.source>1.6</maven.compiler.source>
+        <maven.compiler.target>1.6</maven.compiler.target>
+        <maven.compiler.release>6</maven.compiler.release>
       </properties>
       <build>
         <plugins>

activemq-client/src/main/java/zipkin2/reporter/activemq/ActiveMQSender.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2023 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -77,7 +77,7 @@ public static final class Builder {
     ActiveMQConnectionFactory connectionFactory;
     String queue = "zipkin";
     Encoding encoding = Encoding.JSON;
-    int messageMaxBytes = 500_000;
+    int messageMaxBytes = 500000;
 
     public Builder connectionFactory(ActiveMQConnectionFactory connectionFactory) {
       if (connectionFactory == null) throw new NullPointerException("connectionFactory == null");
@@ -159,9 +159,9 @@ public final ActiveMQSender build() {
   @Override public CheckResult check() {
     try {
       lazyInit.get();
-    } catch (IOException | RuntimeException | Error e) {
-      Call.propagateIfFatal(e);
-      return CheckResult.failed(e);
+    } catch (Throwable t) {
+      Call.propagateIfFatal(t);
+      return CheckResult.failed(t);
     }
     return lazyInit.result.checkResult;
   }
@@ -210,8 +210,9 @@ void send() throws IOException {
       try {
         send();
         callback.onSuccess(null);
-      } catch (IOException | RuntimeException | Error e) {
-        callback.onError(e);
+      } catch (Throwable t) {
+        Call.propagateIfFatal(t);
+        callback.onError(t);
       }
     }
   }

activemq-client/src/test/java/zipkin2/reporter/activemq/ActiveMQExtension.java

@@ -64,7 +64,7 @@ String brokerURL() {
   // mostly waiting for https://github.com/testcontainers/testcontainers-java/issues/3537
   static final class ActiveMQContainer extends GenericContainer<ActiveMQContainer> {
     ActiveMQContainer() {
-      super(parse("ghcr.io/openzipkin/zipkin-activemq:2.26.0"));
+      super(parse("ghcr.io/openzipkin/zipkin-activemq:2.27.0"));
       if ("true".equals(System.getProperty("docker.skip"))) {
         throw new TestAbortedException("${docker.skip} == true");
       }

amqp-client/pom.xml

@@ -34,9 +34,6 @@
     <amqp-client.version>5.20.0</amqp-client.version>
     <!-- Last pre-1.8 version -->
     <old-amqp-client.version>4.12.0</old-amqp-client.version>
-
-    <!-- amqp-client 4.x is Java 1.6 bytecode -->
-    <main.signature.artifact>java16</main.signature.artifact>
   </properties>
 
   <dependencies>
@@ -97,7 +94,9 @@
       <id>release</id>
       <properties>
         <!-- amqp-client 4.x is Java 1.6 bytecode -->
-        <main.java.version>1.6</main.java.version>
+        <maven.compiler.source>1.6</maven.compiler.source>
+        <maven.compiler.target>1.6</maven.compiler.target>
+        <maven.compiler.release>6</maven.compiler.release>
       </properties>
       <build>
         <plugins>

amqp-client/src/it/amqp_v4/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright 2016-2023 The OpenZipkin Authors
+    Copyright 2016-2024 The OpenZipkin Authors
 
     Licensed 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
@@ -30,6 +30,7 @@
 
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.release>8</maven.compiler.release>
   </properties>
 
   <dependencies>

amqp-client/src/main/java/zipkin2/reporter/amqp/RabbitMQSender.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -36,7 +36,7 @@
  * This sends (usually json v2) encoded spans to a RabbitMQ queue.
  *
  * <h3>Usage</h3>
- *
+ * <p>
  * This type is designed for {@link AsyncReporter.Builder#builder(Sender) the async reporter}.
  *
  * <p>Here's a simple configuration, configured for json:
@@ -87,7 +87,7 @@ public static final class Builder {
     List<Address> addresses;
     String queue = "zipkin";
     Encoding encoding = Encoding.JSON;
-    int messageMaxBytes = 500_000;
+    int messageMaxBytes = 500000;
 
     Builder(RabbitMQSender sender) {
       connectionFactory = sender.connectionFactory.clone();
@@ -249,7 +249,9 @@ Connection get() {
   Connection newConnection() {
     try {
       return connectionFactory.newConnection(addresses);
-    } catch (IOException | TimeoutException e) {
+    } catch (IOException e) {
+      throw new RuntimeException("Unable to establish connection to RabbitMQ server", e);
+    } catch (TimeoutException e) {
       throw new RuntimeException("Unable to establish connection to RabbitMQ server", e);
     }
   }
@@ -261,7 +263,7 @@ Connection newConnection() {
     closeCalled = true;
   }
 
-  final ThreadLocal<Channel> CHANNEL = new ThreadLocal<>();
+  final ThreadLocal<Channel> CHANNEL = new ThreadLocal<Channel>();
 
   /**
    * In most circumstances there will only be one thread calling {@link #sendSpans(List)}, the
@@ -298,8 +300,9 @@ void publish() throws IOException {
       try {
         publish();
         callback.onSuccess(null);
-      } catch (IOException | RuntimeException | Error e) {
-        callback.onError(e);
+      } catch (Throwable t) {
+        Call.propagateIfFatal(t);
+        callback.onError(t);
       }
     }
 

amqp-client/src/test/java/zipkin2/reporter/amqp/RabbitMQExtension.java

@@ -82,7 +82,7 @@ int port() {
   // mostly waiting for https://github.com/testcontainers/testcontainers-java/issues/3537
   static final class RabbitMQContainer extends GenericContainer<RabbitMQContainer> {
     RabbitMQContainer() {
-      super(parse("ghcr.io/openzipkin/zipkin-rabbitmq:2.26.0"));
+      super(parse("ghcr.io/openzipkin/zipkin-rabbitmq:2.27.0"));
       if ("true".equals(System.getProperty("docker.skip"))) {
         throw new TestAbortedException("${docker.skip} == true");
       }

benchmarks/src/main/java/zipkin2/reporter/KafkaSenderBenchmarks.java

@@ -41,7 +41,7 @@ public class KafkaSenderBenchmarks extends SenderBenchmarks {
 
   static final class KafkaContainer extends GenericContainer<KafkaContainer> {
     KafkaContainer() {
-      super(parse("ghcr.io/openzipkin/zipkin-kafka:2.26.0"));
+      super(parse("ghcr.io/openzipkin/zipkin-kafka:2.27.0"));
       waitStrategy = Wait.forHealthcheck();
       // Kafka broker listener port (19092) needs to be exposed for test cases to access it.
       addFixedExposedPort(KAFKA_PORT, KAFKA_PORT, InternetProtocol.TCP);

bom/pom.xml

@@ -27,7 +27,7 @@
   <properties>
     <main.basedir>${project.basedir}/..</main.basedir>
     <!-- use the same value in ../pom.xml -->
-    <zipkin.version>2.26.0</zipkin.version>
+    <zipkin.version>2.27.0</zipkin.version>
   </properties>
 
   <url>https://github.com/openzipkin/zipkin-reporter-java</url>

brave/pom.xml

@@ -31,9 +31,6 @@
     <module.name>zipkin2.reporter.brave</module.name>
 
     <main.basedir>${project.basedir}/..</main.basedir>
-
-    <!-- The brave jar needs to be Java 1.6 bytecode -->
-    <main.signature.artifact>java16</main.signature.artifact>
   </properties>
 
   <dependencies>
@@ -75,7 +72,9 @@
       <id>release</id>
       <properties>
         <!-- The brave jar needs to be Java 1.6 bytecode -->
-        <main.java.version>1.6</main.java.version>
+        <maven.compiler.source>1.6</maven.compiler.source>
+        <maven.compiler.target>1.6</maven.compiler.target>
+        <maven.compiler.release>6</maven.compiler.release>
       </properties>
       <build>
         <plugins>

brave/src/main/java/zipkin2/reporter/brave/ConvertingSpanReporter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -129,7 +129,7 @@ enum Consumer implements TagConsumer<Span.Builder>, AnnotationConsumer<Span.Buil
    * Zipkin kind values.
    */
   static Map<Kind, Span.Kind> generateKindMap() {
-    Map<Kind, Span.Kind> result = new LinkedHashMap<>();
+    Map<Kind, Span.Kind> result = new LinkedHashMap<Kind, Span.Kind>();
     // Note: Both Brave and Zipkin treat null kind as a local/in-process span
     for (Kind kind : Kind.values()) {
       try {

core/pom.xml

@@ -31,9 +31,6 @@
     <module.name>zipkin2.reporter</module.name>
 
     <main.basedir>${project.basedir}/..</main.basedir>
-
-    <!-- The core jar needs to be Java 1.6 bytecode -->
-    <main.signature.artifact>java16</main.signature.artifact>
   </properties>
 
   <dependencies>
@@ -49,7 +46,9 @@
       <id>release</id>
       <properties>
         <!-- The core jar needs to be Java 1.6 bytecode -->
-        <main.java.version>1.6</main.java.version>
+        <maven.compiler.source>1.6</maven.compiler.source>
+        <maven.compiler.target>1.6</maven.compiler.target>
+        <maven.compiler.release>6</maven.compiler.release>
       </properties>
       <build>
         <plugins>

core/src/main/java/zipkin2/reporter/AsyncReporter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -202,7 +202,7 @@ public <S> AsyncReporter<S> build(BytesEncoder<S> encoder) {
             "Encoder doesn't match Sender: %s %s", encoder.encoding(), sender.encoding()));
       }
 
-      return new BoundedAsyncReporter<>(this, encoder);
+      return new BoundedAsyncReporter<S>(this, encoder);
     }
   }
 
@@ -222,7 +222,7 @@ static final class BoundedAsyncReporter<S> extends AsyncReporter<S> {
     private boolean shouldWarnException = true;
 
     BoundedAsyncReporter(Builder builder, BytesEncoder<S> encoder) {
-      this.pending = new ByteBoundedQueue<>(builder.queuedMaxSpans, builder.queuedMaxBytes);
+      this.pending = new ByteBoundedQueue<S>(builder.queuedMaxSpans, builder.queuedMaxBytes);
       this.sender = builder.sender;
       this.messageMaxBytes = builder.messageMaxBytes;
       this.messageTimeoutNanos = builder.messageTimeoutNanos;
@@ -239,7 +239,7 @@ static final class BoundedAsyncReporter<S> extends AsyncReporter<S> {
     void startFlusherThread() {
       BufferNextMessage<S> consumer =
           BufferNextMessage.create(encoder.encoding(), messageMaxBytes, messageTimeoutNanos);
-      Thread flushThread = threadFactory.newThread(new Flusher<>(this, consumer));
+      Thread flushThread = threadFactory.newThread(new Flusher<S>(this, consumer));
       flushThread.setName("AsyncReporter{" + sender + "}");
       flushThread.setDaemon(true);
       flushThread.start();
@@ -263,7 +263,7 @@ void startFlusherThread() {
 
     @Override public final void flush() {
       if (closed.get()) throw new ClosedSenderException();
-      flush(BufferNextMessage.create(encoder.encoding(), messageMaxBytes, 0));
+      flush(BufferNextMessage.<S>create(encoder.encoding(), messageMaxBytes, 0));
     }
 
     void flush(BufferNextMessage<S> bundler) {
@@ -282,7 +282,7 @@ void flush(BufferNextMessage<S> bundler) {
       metrics.incrementMessageBytes(bundler.sizeInBytes());
 
       // Create the next message. Since we are outside the lock shared with writers, we can encode
-      ArrayList<byte[]> nextMessage = new ArrayList<>(bundler.count());
+      final ArrayList<byte[]> nextMessage = new ArrayList<byte[]>(bundler.count());
       bundler.drain(new SpanWithSizeConsumer<S>() {
         @Override public boolean offer(S next, int nextSizeInBytes) {
           nextMessage.add(encoder.encode(next)); // speculatively add to the pending message
@@ -377,7 +377,10 @@ static final class Flusher<S> implements Runnable {
         while (!result.closed.get()) {
           result.flush(consumer);
         }
-      } catch (RuntimeException | Error e) {
+      } catch (RuntimeException e) {
+        logger.log(Level.WARNING, "Unexpected error flushing spans", e);
+        throw e;
+      } catch (Error e) {
         logger.log(Level.WARNING, "Unexpected error flushing spans", e);
         throw e;
       } finally {

core/src/main/java/zipkin2/reporter/BufferNextMessage.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2019 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -19,23 +19,22 @@
 
 /** Use of this type happens off the application's main thread. This type is not thread-safe */
 abstract class BufferNextMessage<S> implements SpanWithSizeConsumer<S> {
-
   static <S> BufferNextMessage<S> create(Encoding encoding, int maxBytes, long timeoutNanos) {
     switch (encoding) {
       case JSON:
-        return new BufferNextJsonMessage<>(maxBytes, timeoutNanos);
+        return new BufferNextJsonMessage<S>(maxBytes, timeoutNanos);
       case THRIFT:
-        return new BufferNextThriftMessage<>(maxBytes, timeoutNanos);
+        return new BufferNextThriftMessage<S>(maxBytes, timeoutNanos);
       case PROTO3:
-        return new BufferNextProto3Message<>(maxBytes, timeoutNanos);
+        return new BufferNextProto3Message<S>(maxBytes, timeoutNanos);
     }
     throw new UnsupportedOperationException("encoding: " + encoding);
   }
 
   final int maxBytes;
   final long timeoutNanos;
-  final ArrayList<S> spans = new ArrayList<>();
-  final ArrayList<Integer> sizes = new ArrayList<>();
+  final ArrayList<S> spans = new ArrayList<S>();
+  final ArrayList<Integer> sizes = new ArrayList<Integer>();
 
   long deadlineNanoTime;
   int messageSizeInBytes;

core/src/main/java/zipkin2/reporter/InMemoryReporterMetrics.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2019 The OpenZipkin Authors
+ * Copyright 2016-2024 The OpenZipkin Authors
  *
  * Licensed 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
@@ -30,9 +30,9 @@ enum MetricKey {
   }
 
   private final ConcurrentHashMap<MetricKey, AtomicLong> metrics =
-      new ConcurrentHashMap<>();
+      new ConcurrentHashMap<MetricKey, AtomicLong>();
   private final ConcurrentHashMap<Class<? extends Throwable>, AtomicLong> messagesDropped =
-      new ConcurrentHashMap<>();
+      new ConcurrentHashMap<Class<? extends Throwable>, AtomicLong>();
 
   @Override public void incrementMessages() {
     increment(MetricKey.messages, 1);
@@ -47,7 +47,8 @@ public long messages() {
   }
 
   public Map<Class<? extends Throwable>, Long> messagesDroppedByCause() {
-    Map<Class<? extends Throwable>, Long> result = new LinkedHashMap<>(messagesDropped.size());
+    Map<Class<? extends Throwable>, Long> result =
+      new LinkedHashMap<Class<? extends Throwable>, Long>(messagesDropped.size());
     for (Map.Entry<Class<? extends Throwable>, AtomicLong> kv : messagesDropped.entrySet()) {
       result.put(kv.getKey(), kv.getValue().longValue());
     }
@@ -130,7 +131,7 @@ static <K> void increment(ConcurrentHashMap<K, AtomicLong> metrics, K key, int q
       AtomicLong metric = metrics.get(key);
       if (metric == null) {
         metric = metrics.putIfAbsent(key, new AtomicLong(quantity));
-        if (metric == null) return; // won race creating the entry 
+        if (metric == null) return; // won race creating the entry
       }
 
       while (true) {