Re-enable animalsniffer, fixing violations

In 61f19d7 I swapped the signatures to use the version catalog. But I
failed to preserve the `@signature` extension and it all seemed to
work... But in fact all the animalsniffer tasks were completing as
SKIPPED as they lacked signatures. The build.gradle changes in this
commit are to fix that while still using version catalog.

But while it was broken violations crept in. Most violations weren't
too important and we're not surprised went unnoticed. For example, Netty
with TLS has long required the Java 8 API
`setEndpointIdentificationAlgorithm()`, so using `Optional` in the same
code path didn't harm anything in particular. I still swapped it to
Guava's `Optional` to avoid overuse of `@IgnoreJRERequirement`.

One important violation has not been fixed and instead I've disabled the
android signature in api/build.gradle for the moment.  The violation is
in StatusException using the `fillInStackTrace` overload of Exception.
This problem [had been noticed][PR11066], but we couldn't figure out
what was going on. AnimalSniffer is now noticing this and agreeing with
the internal linter. There is still a question of why our interop tests
failed to notice this, but given they are no longer running on pre-API
level 24, that may forever be a mystery.

[PR11066]: grpc#11066

alts/build.gradle

@@ -44,7 +44,11 @@ dependencies {
             classifier = "linux-x86_64"
         }
     }
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 configureProtoCompilation()

api/build.gradle

@@ -36,6 +36,7 @@ tasks.named("jar").configure {
 dependencies {
     compileOnly sourceSets.context.output
     api libraries.jsr305,
+            libraries.animalsniffer.annotations,
             libraries.errorprone.annotations
     implementation libraries.guava
 
@@ -48,8 +49,18 @@ dependencies {
     testImplementation project(':grpc-testing')
     testImplementation libraries.guava.testlib
 
-    signature libraries.signature.java
-    signature libraries.signature.android
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
+    // Temporarily disabled until StatusException is fixed.
+    // Context: https://github.com/grpc/grpc-java/pull/11066
+    //signature (libraries.signature.android) {
+    //    artifact {
+    //        extension = "signature"
+    //    }
+    //}
 }
 
 tasks.named("javadoc").configure {

api/src/main/java/io/grpc/TimeUtils.java

@@ -17,10 +17,12 @@
 package io.grpc;
 
 import java.time.Duration;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
 
 final class TimeUtils {
   private TimeUtils() {}
 
+  @IgnoreJRERequirement
   static long convertToNanos(Duration duration) {
     try {
       return duration.toNanos();

api/src/test/java/io/grpc/CallOptionsTest.java

@@ -34,6 +34,7 @@
 import io.grpc.internal.SerializingExecutor;
 import java.time.Duration;
 import java.util.concurrent.Executor;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -152,6 +153,7 @@ public void withDeadlineAfter() {
   }
 
   @Test
+  @IgnoreJRERequirement
   public void withDeadlineAfterDuration() {
     Deadline actual = CallOptions.DEFAULT.withDeadlineAfter(Duration.ofMinutes(1L)).getDeadline();
     Deadline expected = Deadline.after(1, MINUTES);

api/src/test/java/io/grpc/SynchronizationContextTest.java

@@ -36,6 +36,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
@@ -248,6 +249,7 @@ public void schedule() {
   }
 
   @Test
+  @IgnoreJRERequirement
   public void scheduleDuration() {
     MockScheduledExecutorService executorService = new MockScheduledExecutorService();
     ScheduledHandle handle =
@@ -265,6 +267,7 @@ public void scheduleDuration() {
   }
 
   @Test
+  @IgnoreJRERequirement
   public void scheduleWithFixedDelayDuration() {
     MockScheduledExecutorService executorService = new MockScheduledExecutorService();
     ScheduledHandle handle =
@@ -402,4 +405,4 @@ static class MockScheduledExecutorService extends ForwardingScheduledExecutorSer
       return future = super.scheduleWithFixedDelay(command, intialDelay, delay, unit);
     }
   }
-}
+}

api/src/test/java/io/grpc/TimeUtilsTest.java

@@ -19,12 +19,14 @@
 import static org.junit.Assert.assertEquals;
 
 import java.time.Duration;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
 /** Unit tests for {@link TimeUtils}. */
 @RunWith(JUnit4.class)
+@IgnoreJRERequirement
 public class TimeUtilsTest {
 
   @Test
@@ -56,4 +58,4 @@ public void testConvertTooLargeNegativeDuration() {
 
     assertEquals(Long.MIN_VALUE, TimeUtils.convertToNanos(duration));
   }
-}
+}

auth/build.gradle

@@ -22,6 +22,14 @@ dependencies {
             project(':grpc-core'),
             project(":grpc-context"), // Override google-auth dependency with our newer version
             libraries.google.auth.oauth2Http
-    signature libraries.signature.java
-    signature libraries.signature.android
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
+    signature (libraries.signature.android) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }

authz/build.gradle

@@ -26,7 +26,11 @@ dependencies {
     shadow configurations.implementation.getDependencies().minus([xdsDependency])
     shadow project(path: ':grpc-xds', configuration: 'shadow')
 
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 tasks.named("jar").configure {

benchmarks/build.gradle

@@ -43,7 +43,11 @@ dependencies {
     testImplementation libraries.junit,
             libraries.mockito.core
 
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 import net.ltgt.gradle.errorprone.CheckSeverity

census/build.gradle

@@ -27,8 +27,16 @@ dependencies {
             project(':grpc-testing'),
             libraries.opencensus.impl
 
-    signature libraries.signature.java
-    signature libraries.signature.android
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
+    signature (libraries.signature.android) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 tasks.named("javadoc").configure {

contextstorage/build.gradle

@@ -16,8 +16,16 @@ dependencies {
             libraries.assertj.core
     testImplementation 'junit:junit:4.13.1'// opentelemetry.sdk.testing uses compileOnly for assertj
 
-    signature libraries.signature.java
-    signature libraries.signature.android
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
+    signature (libraries.signature.android) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 tasks.named("jar").configure {

core/build.gradle

@@ -39,8 +39,16 @@ dependencies {
 
     jmh project(':grpc-testing')
 
-    signature libraries.signature.java
-    signature libraries.signature.android
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
+    signature (libraries.signature.android) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 tasks.named("javadoc").configure {

core/src/main/java/io/grpc/internal/SpiffeUtil.java

@@ -23,13 +23,12 @@
 import com.google.common.base.Splitter;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.io.Files;
 import java.io.ByteArrayInputStream;
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.security.cert.Certificate;
 import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
@@ -188,8 +187,8 @@ public static SpiffeBundle loadTrustBundleFromFile(String trustBundleFile) throw
   }
 
   private static Map<String, ?> readTrustDomainsFromFile(String filePath) throws IOException {
-    Path path = Paths.get(checkNotNull(filePath, "trustBundleFile"));
-    String json = new String(Files.readAllBytes(path), StandardCharsets.UTF_8);
+    File file = new File(checkNotNull(filePath, "trustBundleFile"));
+    String json = new String(Files.toByteArray(file), StandardCharsets.UTF_8);
     Object jsonObject = JsonParser.parse(json);
     if (!(jsonObject instanceof Map)) {
       throw new IllegalArgumentException(

core/src/test/java/io/grpc/internal/ConcurrentTimeProviderTest.java

@@ -18,7 +18,6 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
-import java.time.Instant;
 import java.util.concurrent.TimeUnit;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -36,10 +35,8 @@ public void testConcurrentCurrentTimeNanos() {
     // Get the current time from the ConcurrentTimeProvider
     long actualTimeNanos = concurrentTimeProvider.currentTimeNanos();
 
-    // Get the current time from Instant for comparison
-    Instant instantNow = Instant.now();
-    long expectedTimeNanos = TimeUnit.SECONDS.toNanos(instantNow.getEpochSecond())
-        + instantNow.getNano();
+    // Get the current time from System for comparison
+    long expectedTimeNanos = TimeUnit.MILLISECONDS.toNanos(System.currentTimeMillis());
 
     // Validate the time returned is close to the expected value within a tolerance
     // (i,e 10 millisecond tolerance in nanoseconds).

core/src/test/java/io/grpc/internal/InstantTimeProviderTest.java

@@ -20,6 +20,7 @@
 
 import java.time.Instant;
 import java.util.concurrent.TimeUnit;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -28,6 +29,7 @@
  * Unit tests for {@link InstantTimeProvider}.
  */
 @RunWith(JUnit4.class)
+@IgnoreJRERequirement
 public class InstantTimeProviderTest {
   @Test
   public void testInstantCurrentTimeNanos() throws Exception {

core/src/test/java/io/grpc/internal/ManagedChannelImplTest.java

@@ -57,6 +57,7 @@
 import com.google.common.base.Throwables;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Iterables;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.SettableFuture;
@@ -1199,8 +1200,10 @@ public void addressResolutionError_noPriorNameResolution_usesDefaultServiceConfi
     // config simply gets ignored and not gets reassigned.
     resolver.resolved();
     timer.forwardNanos(1234);
-    assertThat(getStats(channel).channelTrace.events.stream().filter(
-        event -> event.description.equals("Service config changed")).count()).isEqualTo(0);
+    assertThat(Iterables.filter(
+          getStats(channel).channelTrace.events,
+          event -> event.description.equals("Service config changed")))
+        .isEmpty();
   }
 
   @Test

core/src/test/java/io/grpc/internal/SpiffeUtilTest.java

@@ -22,15 +22,16 @@
 import static org.junit.Assert.assertTrue;
 
 import com.google.common.base.Optional;
+import com.google.common.io.ByteStreams;
 import io.grpc.internal.SpiffeUtil.SpiffeBundle;
 import io.grpc.internal.SpiffeUtil.SpiffeId;
 import io.grpc.testing.TlsTesting;
 import io.grpc.util.CertificateUtils;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
 import java.io.InputStream;
-import java.nio.file.Files;
-import java.nio.file.NoSuchFileException;
-import java.nio.file.Path;
-import java.nio.file.StandardCopyOption;
+import java.io.OutputStream;
 import java.security.cert.X509Certificate;
 import java.util.Arrays;
 import java.util.Collection;
@@ -247,10 +248,12 @@ public void setUp() throws Exception {
     }
 
     private String copyFileToTmp(String fileName) throws Exception {
-      Path tempFilePath = tempFolder.newFile(fileName).toPath();
+      File tempFilePath = tempFolder.newFile(fileName);
       try (InputStream resourceStream = SpiffeUtilTest.class.getClassLoader()
-          .getResourceAsStream(TEST_DIRECTORY_PREFIX + fileName)) {
-        Files.copy(resourceStream, tempFilePath, StandardCopyOption.REPLACE_EXISTING);
+            .getResourceAsStream(TEST_DIRECTORY_PREFIX + fileName);
+          OutputStream fileStream = new FileOutputStream(tempFilePath)) {
+        ByteStreams.copy(resourceStream, fileStream);
+        fileStream.flush();
       }
       return tempFilePath.toString();
     }
@@ -358,9 +361,11 @@ public void loadTrustBundleFromFileParameterValidityTest() {
       NullPointerException npe = assertThrows(NullPointerException.class, () -> SpiffeUtil
           .loadTrustBundleFromFile(null));
       assertEquals("trustBundleFile", npe.getMessage());
-      NoSuchFileException nsfe = assertThrows(NoSuchFileException.class, () -> SpiffeUtil
+      FileNotFoundException nsfe = assertThrows(FileNotFoundException.class, () -> SpiffeUtil
           .loadTrustBundleFromFile("i_do_not_exist"));
-      assertEquals("i_do_not_exist", nsfe.getMessage());
+      assertTrue(
+          "Did not contain expected substring: " + nsfe.getMessage(),
+          nsfe.getMessage().contains("i_do_not_exist"));
     }
   }
-}
+}

gae-interop-testing/gae-jdk8/build.gradle

@@ -53,7 +53,11 @@ dependencies {
     implementation libraries.junit
     implementation libraries.protobuf.java
     runtimeOnly libraries.netty.tcnative, libraries.netty.tcnative.classes
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 tasks.named("compileJava").configure {

gcp-csm-observability/build.gradle

@@ -28,5 +28,9 @@ dependencies {
             libraries.opentelemetry.sdk.testing,
             libraries.assertj.core // opentelemetry.sdk.testing uses compileOnly for this dep
 
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }

gcp-observability/build.gradle

@@ -74,7 +74,11 @@ dependencies {
         exclude group: 'junit', module: 'junit'
     }
 
-    signature libraries.signature.java
+    signature (libraries.signature.java) {
+        artifact {
+            extension = "signature"
+        }
+    }
 }
 
 configureProtoCompilation()