all: add jdk8 and 14 builds

Added support for building an running with jdk14 and 8.   14 requires building with bytecode for java 7, so the target level must be raised for testing.  8 does not support building java 9 classes, so must be disabled.   These are mainly for testing.  Release will still be built with JDK 11, which supports both.

.travis.yml

@@ -1,7 +1,11 @@
 language: java
 
-jdk:
-  - openjdk11
+matrix:
+  include:
+    - jdk: openjdk8
+    - jdk: openjdk11
+    - jdk: openjdk14 
+
 
 notifications:
   email: false

agent/build.gradle

@@ -16,9 +16,15 @@ dependencies {
 
 }
 
+import net.ltgt.gradle.errorprone.CheckSeverity
+
 compileTestJava {
-    sourceCompatibility = 1.9
-    targetCompatibility = 1.9
+    // Broken in JDK12+.  See https://github.com/google/error-prone/issues/1106
+    properties.put("errorProne", "false")
+    options.errorprone.check("SameNameButDifferent", CheckSeverity.OFF)
+
+    sourceCompatibility = 1.8
+    targetCompatibility = 1.8
 }
 
 jar {

agent/src/test/java/io/perfmark/agent/PerfMarkTransformerTest.java

@@ -27,7 +27,9 @@
 import io.perfmark.impl.Internal;
 import io.perfmark.impl.Mark;
 import io.perfmark.impl.Storage;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
 import java.lang.reflect.Constructor;
 import java.util.List;
 import java.util.concurrent.Executor;
@@ -329,7 +331,16 @@ public void transform_toplevel() throws Exception {
 
   private static byte[] getBytes(Class<?> clz) throws IOException {
     String className = clz.getName().replace('.', '/') + ".class";
-    return clz.getClassLoader().getResourceAsStream(className).readAllBytes();
+    try (InputStream stream = clz.getClassLoader().getResourceAsStream(className);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
+      int read;
+      byte[] buf = new byte[1024];
+      while ((read = stream.read(buf)) != -1) {
+        baos.write(buf, 0, read);
+      }
+
+      return baos.toByteArray();
+    }
   }
 
   private static final class TestClassLoader extends ClassLoader {

api/build.gradle

@@ -1,7 +1,12 @@
 description = "PerfMark API"
 
-sourceCompatibility = 1.6
-targetCompatibility = 1.6
+if (JavaVersion.current().isJava12Compatible()) {
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
+} else {
+    sourceCompatibility = 1.6
+    targetCompatibility = 1.6
+}
 
 dependencies {
     compileOnly libraries.jsr305,
@@ -14,15 +19,14 @@ dependencies {
             project(':perfmark-java7')
 }
 
-
 compileTestJava {
     sourceCompatibility = 1.7
     targetCompatibility = 1.7
 }
 
 compileJmhJava {
-    sourceCompatibility = 1.9
-    targetCompatibility = 1.9
+    sourceCompatibility = 1.8
+    targetCompatibility = 1.8
 }
 
 java {

build.gradle

@@ -1,6 +1,5 @@
 buildscript {
     repositories {
-        mavenLocal()
         maven { url "https://plugins.gradle.org/m2/" }
         jcenter()
     }
@@ -28,7 +27,6 @@ subprojects {
         maven {
             url "https://maven-central.storage-download.googleapis.com/repos/central/data/" }
         mavenCentral()
-        mavenLocal()
     }
 
 
@@ -108,7 +106,6 @@ subprojects {
                      }
                  }
             }
-            mavenLocal()
         }
     }
 
@@ -138,7 +135,7 @@ subprojects {
         }
     }
 
-    jacoco { toolVersion = "0.8.2" }
+    jacoco { toolVersion = "0.8.5" }
 
     group = "io.perfmark"
     version = "0.22.0-SNAPSHOT"

impl/build.gradle

@@ -1,7 +1,12 @@
 description = "PerfMark Implementation API"
 
-sourceCompatibility = 1.6
-targetCompatibility = 1.6
+if (JavaVersion.current().isJava12Compatible()) {
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
+} else {
+    sourceCompatibility = 1.6
+    targetCompatibility = 1.6
+}
 
 dependencies {
     implementation project(':perfmark-api')

java6/build.gradle

@@ -1,7 +1,12 @@
 description = "PerfMark Java6 API"
 
-sourceCompatibility = 1.6
-targetCompatibility = 1.6
+if (JavaVersion.current().isJava12Compatible()) {
+    sourceCompatibility = 1.7
+    targetCompatibility = 1.7
+} else {
+    sourceCompatibility = 1.6
+    targetCompatibility = 1.6
+}
 
 dependencies {
     implementation project(':perfmark-impl')

java9/build.gradle

@@ -2,6 +2,12 @@ apply plugin: 'jcstress'
 
 description = "PerfMark Java9 API"
 
+if (!JavaVersion.current().isJava9Compatible()) {
+    project.tasks.all {
+        task -> task.enabled = false
+    }
+}
+
 sourceCompatibility = 1.9
 targetCompatibility = 1.9