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Posted to commits@logging.apache.org by pk...@apache.org on 2024/04/04 21:50:52 UTC
(logging-log4j2) 14/14: Delegate `ScopedContext` functionality to interface
This is an automated email from the ASF dual-hosted git repository.
pkarwasz pushed a commit to branch ScopedContext-replace-with-interface
in repository https://gitbox.apache.org/repos/asf/logging-log4j2.git
commit c64a08a41945b31537549d104a65c82ee8374018
Author: Piotr P. Karwasz <pi...@karwasz.org>
AuthorDate: Thu Apr 4 23:46:52 2024 +0200
Delegate `ScopedContext` functionality to interface
To provide more configurability for the `ScopedContext` service, this PR
moves its implementation details to `log4j-core` and replaces it with a
`ScopedContextProvider` interface.
In Log4j API only a NO-OP version of the provider is present, but each
implementation of the API can provide its own.
---
log4j-api-test/pom.xml | 11 +-
.../org/apache/logging/log4j/test/TestLogger.java | 5 +-
.../log4j/test/spi/ScopedContextProviderSuite.java | 178 ++++++++
.../apache/logging/log4j/ResourceLoggerTest.java | 2 +
.../apache/logging/log4j/ScopedContextTest.java | 154 -------
.../org/apache/logging/log4j/ScopedContext.java | 487 +++------------------
.../apache/logging/log4j/simple/SimpleLogger.java | 7 +-
.../org/apache/logging/log4j/spi/Provider.java | 7 +
.../logging/log4j/spi/ScopedContextProvider.java | 81 ++++
.../spi/internal/NoopScopedContextProvider.java | 99 +++++
.../internal/DefaultScopedContextProviderTest.java | 57 +++
.../logging/log4j/core/impl/Log4jProvider.java | 17 +
.../log4j/core/impl/ScopedContextDataProvider.java | 20 +-
.../internal/DefaultScopedContextProvider.java | 389 ++++++++++++++++
14 files changed, 908 insertions(+), 606 deletions(-)
diff --git a/log4j-api-test/pom.xml b/log4j-api-test/pom.xml
index 0ef2578dd8..40d4dc2525 100644
--- a/log4j-api-test/pom.xml
+++ b/log4j-api-test/pom.xml
@@ -37,6 +37,7 @@
<bnd-module-name>org.apache.logging.log4j.test</bnd-module-name>
<bnd-extra-package-options>
org.apache.commons.lang3.*;resolution:=optional,
+ org.assertj.*;resolution:=optional,
<!-- Both JUnit 4 and JUnit 5 are not required -->
org.junit.*;resolution:=optional,
org.hamcrest.*;resolution:=optional,
@@ -48,6 +49,7 @@
<bnd-extra-module-options>
<!-- Non-transitive static modules -->
junit;transitive=false,
+ org.assertj.core;transitive=false,
org.hamcrest;transitive=false,
org.junit.jupiter.api;transitive=false,
org.junitpioneer;transitive=false,
@@ -72,6 +74,10 @@
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
</dependency>
+ <dependency>
+ <groupId>org.assertj</groupId>
+ <artifactId>assertj-core</artifactId>
+ </dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
@@ -108,11 +114,6 @@
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-utils</artifactId>
</dependency>
- <dependency>
- <groupId>org.assertj</groupId>
- <artifactId>assertj-core</artifactId>
- <scope>test</scope>
- </dependency>
<!-- Required for JSON support -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
diff --git a/log4j-api-test/src/main/java/org/apache/logging/log4j/test/TestLogger.java b/log4j-api-test/src/main/java/org/apache/logging/log4j/test/TestLogger.java
index 88e02cbbed..d3f7217108 100644
--- a/log4j-api-test/src/main/java/org/apache/logging/log4j/test/TestLogger.java
+++ b/log4j-api-test/src/main/java/org/apache/logging/log4j/test/TestLogger.java
@@ -25,11 +25,11 @@ import java.util.List;
import java.util.Map;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Marker;
-import org.apache.logging.log4j.ScopedContext;
import org.apache.logging.log4j.ThreadContext;
import org.apache.logging.log4j.message.Message;
import org.apache.logging.log4j.message.MessageFactory;
import org.apache.logging.log4j.spi.AbstractLogger;
+import org.apache.logging.log4j.util.ProviderUtil;
/**
*
@@ -81,7 +81,8 @@ public class TestLogger extends AbstractLogger {
sb.append(' ');
}
sb.append(message.getFormattedMessage());
- Map<String, Object> contextMap = ScopedContext.getContextMap();
+ final Map<String, ?> contextMap =
+ ProviderUtil.getProvider().getScopedContextProvider().getContextMap();
final Map<String, String> mdc = new HashMap<>(ThreadContext.getImmutableContext());
if (contextMap != null && !contextMap.isEmpty()) {
contextMap.forEach((key, value) -> mdc.put(key, value.toString()));
diff --git a/log4j-api-test/src/main/java/org/apache/logging/log4j/test/spi/ScopedContextProviderSuite.java b/log4j-api-test/src/main/java/org/apache/logging/log4j/test/spi/ScopedContextProviderSuite.java
new file mode 100644
index 0000000000..dc0e747776
--- /dev/null
+++ b/log4j-api-test/src/main/java/org/apache/logging/log4j/test/spi/ScopedContextProviderSuite.java
@@ -0,0 +1,178 @@
+/*
+ * 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.logging.log4j.test.spi;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+import org.apache.logging.log4j.ScopedContext;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+
+/**
+ * Provides test that should be passed by all implementations of {@link ScopedContextProviderSuite}.
+ * @since 2.24.0
+ */
+public abstract class ScopedContextProviderSuite {
+
+ private static ScopedContext.Instance where(
+ final ScopedContextProvider provider, final String key, final Object value) {
+ return provider.newScopedContext(key, value);
+ }
+
+ protected static void testScope(final ScopedContextProvider scopedContext) {
+ where(scopedContext, "key1", "Log4j2")
+ .run(() -> assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2"));
+ where(scopedContext, "key1", "value1").run(() -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("value1");
+ where(scopedContext, "key2", "value2").run(() -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("value1");
+ assertThat(scopedContext.getValue("key2")).isEqualTo("value2");
+ });
+ });
+ }
+
+ private static void runWhere(
+ final ScopedContextProvider provider, final String key, final Object value, final Runnable task) {
+ provider.newScopedContext(key, value).run(task);
+ }
+
+ private static Future<Void> runWhere(
+ final ScopedContextProvider provider,
+ final String key,
+ final Object value,
+ final ExecutorService executorService,
+ final Runnable task) {
+ return provider.newScopedContext(key, value).run(executorService, task);
+ }
+
+ protected static void testRunWhere(final ScopedContextProvider scopedContext) {
+ runWhere(scopedContext, "key1", "Log4j2", () -> assertThat(scopedContext.getValue("key1"))
+ .isEqualTo("Log4j2"));
+ runWhere(scopedContext, "key1", "value1", () -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("value1");
+ runWhere(scopedContext, "key2", "value2", () -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("value1");
+ assertThat(scopedContext.getValue("key2")).isEqualTo("value2");
+ });
+ });
+ }
+
+ protected static void testRunThreads(final ScopedContextProvider scopedContext) {
+ BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
+ ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
+ final long id = Thread.currentThread().getId();
+ final AtomicLong counter = new AtomicLong(0);
+ runWhere(scopedContext, "key1", "Log4j2", () -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ Future<?> future = runWhere(scopedContext, "key2", "value2", executorService, () -> {
+ assertNotEquals(Thread.currentThread().getId(), id);
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ counter.incrementAndGet();
+ });
+ assertDoesNotThrow(() -> {
+ future.get();
+ assertTrue(future.isDone());
+ assertThat(counter.get()).isEqualTo(1);
+ });
+ });
+ }
+
+ protected static void testThreads(final ScopedContextProvider scopedContext) throws Exception {
+ BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
+ ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
+ final long id = Thread.currentThread().getId();
+ final AtomicLong counter = new AtomicLong(0);
+ where(scopedContext, "key1", "Log4j2").run(() -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ Future<?> future = where(scopedContext, "key2", "value2").run(executorService, () -> {
+ assertNotEquals(Thread.currentThread().getId(), id);
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ counter.incrementAndGet();
+ });
+ assertDoesNotThrow(() -> {
+ future.get();
+ assertTrue(future.isDone());
+ assertThat(counter.get()).isEqualTo(1);
+ });
+ });
+ }
+
+ protected static void testThreadException(final ScopedContextProvider scopedContext) throws Exception {
+ BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
+ final AtomicBoolean exceptionCaught = new AtomicBoolean(false);
+ ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
+ long id = Thread.currentThread().getId();
+ runWhere(scopedContext, "key1", "Log4j2", () -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ Future<?> future = where(scopedContext, "key2", "value2").run(executorService, () -> {
+ assertNotEquals(Thread.currentThread().getId(), id);
+ throw new NullPointerException("On purpose NPE");
+ });
+ assertThatThrownBy(future::get)
+ .hasRootCauseInstanceOf(NullPointerException.class)
+ .hasRootCauseMessage("On purpose NPE");
+ });
+ }
+
+ private static <R> R callWhere(
+ final ScopedContextProvider provider, final String key, final Object value, final Callable<R> task)
+ throws Exception {
+ return provider.newScopedContext(key, value).call(task);
+ }
+
+ private static <R> Future<R> callWhere(
+ final ScopedContextProvider provider,
+ final String key,
+ final Object value,
+ final ExecutorService executorService,
+ final Callable<R> task) {
+ return provider.newScopedContext(key, value).call(executorService, task);
+ }
+
+ protected static void testThreadCall(final ScopedContextProvider scopedContext) throws Exception {
+ BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
+ ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
+ final long id = Thread.currentThread().getId();
+ final AtomicInteger counter = new AtomicInteger(0);
+ int returnVal = callWhere(scopedContext, "key1", "Log4j2", () -> {
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ Future<Integer> future = callWhere(scopedContext, "key2", "value2", executorService, () -> {
+ assertNotEquals(Thread.currentThread().getId(), id);
+ assertThat(scopedContext.getValue("key1")).isEqualTo("Log4j2");
+ return counter.incrementAndGet();
+ });
+ Integer val = future.get();
+ assertTrue(future.isDone());
+ assertThat(counter.get()).isEqualTo(1);
+ return val;
+ });
+ assertThat(returnVal).isEqualTo(1);
+ }
+}
diff --git a/log4j-api-test/src/test/java/org/apache/logging/log4j/ResourceLoggerTest.java b/log4j-api-test/src/test/java/org/apache/logging/log4j/ResourceLoggerTest.java
index 4822a52e12..c2273e2790 100644
--- a/log4j-api-test/src/test/java/org/apache/logging/log4j/ResourceLoggerTest.java
+++ b/log4j-api-test/src/test/java/org/apache/logging/log4j/ResourceLoggerTest.java
@@ -29,11 +29,13 @@ import java.util.function.Supplier;
import org.apache.logging.log4j.test.TestLogger;
import org.apache.logging.log4j.test.TestLoggerContextFactory;
import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
/**
* Class Description goes here.
*/
+@Disabled("Does not work with the NO-OP implementation of ScopedContextProvider in the API.")
public class ResourceLoggerTest {
@BeforeAll
public static void beforeAll() {
diff --git a/log4j-api-test/src/test/java/org/apache/logging/log4j/ScopedContextTest.java b/log4j-api-test/src/test/java/org/apache/logging/log4j/ScopedContextTest.java
deleted file mode 100644
index d9ba5872e6..0000000000
--- a/log4j-api-test/src/test/java/org/apache/logging/log4j/ScopedContextTest.java
+++ /dev/null
@@ -1,154 +0,0 @@
-/*
- * 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.logging.log4j;
-
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.equalTo;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assertions.fail;
-
-import java.util.concurrent.ArrayBlockingQueue;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Future;
-import java.util.concurrent.ThreadPoolExecutor;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicLong;
-import org.junit.jupiter.api.Test;
-
-public class ScopedContextTest {
-
- @Test
- public void testScope() {
- ScopedContext.where("key1", "Log4j2").run(() -> assertThat(ScopedContext.get("key1"), equalTo("Log4j2")));
- ScopedContext.where("key1", "value1").run(() -> {
- assertThat(ScopedContext.get("key1"), equalTo("value1"));
- ScopedContext.where("key2", "value2").run(() -> {
- assertThat(ScopedContext.get("key1"), equalTo("value1"));
- assertThat(ScopedContext.get("key2"), equalTo("value2"));
- });
- });
- }
-
- @Test
- public void testRunWhere() {
- ScopedContext.runWhere("key1", "Log4j2", () -> assertThat(ScopedContext.get("key1"), equalTo("Log4j2")));
- ScopedContext.runWhere("key1", "value1", () -> {
- assertThat(ScopedContext.get("key1"), equalTo("value1"));
- ScopedContext.runWhere("key2", "value2", () -> {
- assertThat(ScopedContext.get("key1"), equalTo("value1"));
- assertThat(ScopedContext.get("key2"), equalTo("value2"));
- });
- });
- }
-
- @Test
- public void testRunThreads() throws Exception {
- BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
- ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
- final long id = Thread.currentThread().getId();
- final AtomicLong counter = new AtomicLong(0);
- ScopedContext.runWhere("key1", "Log4j2", () -> {
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- Future<?> future = ScopedContext.runWhere("key2", "value2", executorService, () -> {
- assertNotEquals(Thread.currentThread().getId(), id);
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- counter.incrementAndGet();
- });
- try {
- future.get();
- assertTrue(future.isDone());
- assertEquals(1, counter.get());
- } catch (Exception ex) {
- fail("Failed with " + ex.getMessage());
- }
- });
- }
-
- @Test
- public void testThreads() throws Exception {
- BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
- ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
- final long id = Thread.currentThread().getId();
- final AtomicLong counter = new AtomicLong(0);
- ScopedContext.where("key1", "Log4j2").run(() -> {
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- Future<?> future = ScopedContext.where("key2", "value2").run(executorService, () -> {
- assertNotEquals(Thread.currentThread().getId(), id);
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- counter.incrementAndGet();
- });
- try {
- future.get();
- assertTrue(future.isDone());
- assertEquals(1, counter.get());
- } catch (Exception ex) {
- fail("Failed with " + ex.getMessage());
- }
- });
- }
-
- @Test
- public void testThreadException() throws Exception {
- BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
- final AtomicBoolean exceptionCaught = new AtomicBoolean(false);
- ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
- long id = Thread.currentThread().getId();
- ScopedContext.runWhere("key1", "Log4j2", () -> {
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- Future<?> future = ScopedContext.where("key2", "value2").run(executorService, () -> {
- assertNotEquals(Thread.currentThread().getId(), id);
- throw new NullPointerException("On purpose NPE");
- });
- try {
- future.get();
- } catch (ExecutionException ex) {
- assertThat(ex.getMessage(), equalTo("java.lang.NullPointerException: On purpose NPE"));
- return;
- } catch (Exception ex) {
- fail("Failed with " + ex.getMessage());
- }
- fail("No exception caught");
- });
- }
-
- @Test
- public void testThreadCall() throws Exception {
- BlockingQueue<Runnable> workQueue = new ArrayBlockingQueue<>(5);
- ExecutorService executorService = new ThreadPoolExecutor(1, 2, 30, TimeUnit.SECONDS, workQueue);
- final long id = Thread.currentThread().getId();
- final AtomicInteger counter = new AtomicInteger(0);
- int returnVal = ScopedContext.callWhere("key1", "Log4j2", () -> {
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- Future<Integer> future = ScopedContext.callWhere("key2", "value2", executorService, () -> {
- assertNotEquals(Thread.currentThread().getId(), id);
- assertThat(ScopedContext.get("key1"), equalTo("Log4j2"));
- return counter.incrementAndGet();
- });
- Integer val = future.get();
- assertTrue(future.isDone());
- assertEquals(1, counter.get());
- return val;
- });
- assertThat(returnVal, equalTo(1));
- }
-}
diff --git a/log4j-api/src/main/java/org/apache/logging/log4j/ScopedContext.java b/log4j-api/src/main/java/org/apache/logging/log4j/ScopedContext.java
index 8a57ac4361..3962190572 100644
--- a/log4j-api/src/main/java/org/apache/logging/log4j/ScopedContext.java
+++ b/log4j-api/src/main/java/org/apache/logging/log4j/ScopedContext.java
@@ -16,151 +16,42 @@
*/
package org.apache.logging.log4j;
-import java.util.ArrayDeque;
-import java.util.Collections;
-import java.util.Deque;
-import java.util.HashMap;
import java.util.Map;
-import java.util.Optional;
import java.util.concurrent.Callable;
-import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.function.Supplier;
-import org.apache.logging.log4j.status.StatusLogger;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+import org.apache.logging.log4j.util.ProviderUtil;
/**
* Context that can be used for data to be logged in a block of code.
- *
+ * <p>
* While this is influenced by ScopedValues from Java 21 it does not share the same API. While it can perform a
* similar function as a set of ScopedValues it is really meant to allow a block of code to include a set of keys and
* values in all the log events within that block. The underlying implementation must provide support for
* logging the ScopedContext for that to happen.
- *
+ * </p>
+ * <p>
* The ScopedContext will not be bound to the current thread until either a run or call method is invoked. The
* contexts are nested so creating and running or calling via a second ScopedContext will result in the first
* ScopedContext being hidden until the call is returned. Thus the values from the first ScopedContext need to
* be added to the second to be included.
- *
+ * </p>
+ * <p>
* The ScopedContext can be passed to child threads by including the ExecutorService to be used to manage the
* run or call methods. The caller should interact with the ExecutorService as if they were submitting their
* run or call methods directly to it. The ScopedContext performs no error handling other than to ensure the
* ThreadContext and ScopedContext are cleaned up from the executed Thread.
- *
+ * </p>
* @since 2.24.0
*/
-public class ScopedContext {
-
- public static final Logger LOGGER = StatusLogger.getLogger();
-
- private static final ThreadLocal<Deque<Instance>> scopedContext = new ThreadLocal<>();
-
- /**
- * Returns an immutable Map containing all the key/value pairs as Object objects.
- * @return An immutable copy of the Map at the current scope.
- */
- private static Optional<Instance> getContext() {
- Deque<Instance> stack = scopedContext.get();
- if (stack != null) {
- return Optional.of(stack.getFirst());
- }
- return Optional.empty();
- }
-
- /**
- * Add the ScopeContext.
- * @param context The ScopeContext.
- */
- private static void addScopedContext(Instance context) {
- Deque<Instance> stack = scopedContext.get();
- if (stack == null) {
- stack = new ArrayDeque<>();
- scopedContext.set(stack);
- }
- stack.addFirst(context);
- }
+public final class ScopedContext {
- /**
- * Remove the top ScopeContext.
- */
- private static void removeScopedContext() {
- Deque<Instance> stack = scopedContext.get();
- if (stack != null) {
- if (!stack.isEmpty()) {
- stack.removeFirst();
- }
- if (stack.isEmpty()) {
- scopedContext.remove();
- }
- }
- }
-
- /**
- * @hidden
- * Returns an unmodifiable copy of the current ScopedContext Map. This method should
- * only be used by implementations of Log4j API.
- * @return the Map of Object objects.
- */
- public static Map<String, Object> getContextMap() {
- Optional<Instance> context = getContext();
- if (context.isPresent()
- && context.get().contextMap != null
- && !context.get().contextMap.isEmpty()) {
- return Collections.unmodifiableMap(context.get().contextMap);
- }
- return Collections.emptyMap();
- }
+ private static final ScopedContextProvider provider =
+ ProviderUtil.getProvider().getScopedContextProvider();
- /**
- * @hidden
- * Returns the number of entries in the context map.
- * @return the number of items in the context map.
- */
- public static int size() {
- Optional<Instance> context = getContext();
- return context.map(instance -> instance.contextMap.size()).orElse(0);
- }
-
- /**
- * Return the value of the key from the current ScopedContext, if there is one and the key exists.
- * @param key The key.
- * @return The value of the key in the current ScopedContext.
- */
- @SuppressWarnings("unchecked")
- public static <T> T get(String key) {
- Optional<Instance> context = getContext();
- return context.map(instance -> (T) instance.contextMap.get(key)).orElse(null);
- }
-
- /**
- * Return String value of the key from the current ScopedContext, if there is one and the key exists.
- * @param key The key.
- * @return The value of the key in the current ScopedContext.
- */
- public static String getString(String key) {
- Optional<Instance> context = getContext();
- if (context.isPresent()) {
- Object obj = context.get().contextMap.get(key);
- if (obj != null) {
- return obj.toString();
- }
- }
- return null;
- }
-
- /**
- * Adds all the String rendered objects in the context map to the provided Map.
- * @param map The Map to add entries to.
- */
- public static void addAll(Map<String, String> map) {
- Optional<Instance> context = getContext();
- if (context.isPresent()) {
- Map<String, Object> contextMap = context.get().contextMap;
- if (contextMap != null && !contextMap.isEmpty()) {
- contextMap.forEach((key, value) -> map.put(key, value.toString()));
- }
- }
- }
+ private ScopedContext() {}
/**
* Creates a ScopedContext Instance with a key/value pair.
@@ -170,18 +61,8 @@ public class ScopedContext {
* @return the Instance constructed if a valid key and value were provided. Otherwise, either the
* current Instance is returned or a new Instance is created if there is no current Instance.
*/
- public static Instance where(String key, Object value) {
- if (value != null) {
- Instance parent = getContext().isPresent() ? getContext().get() : null;
- return new Instance(parent, key, value);
- } else {
- if (getContext().isPresent()) {
- Map<String, Object> map = getContextMap();
- map.remove(key);
- return new Instance(map);
- }
- }
- return getContext().isPresent() ? getContext().get() : new Instance();
+ public static Instance where(final String key, final Object value) {
+ return provider.newScopedContext(key, value);
}
/**
@@ -191,7 +72,7 @@ public class ScopedContext {
* @param supplier the function to generate the value.
* @return the ScopedContext being constructed.
*/
- public static Instance where(String key, Supplier<Object> supplier) {
+ public static Instance where(final String key, final Supplier<Object> supplier) {
return where(key, supplier.get());
}
@@ -200,211 +81,76 @@ public class ScopedContext {
* @param map the Map.
* @return the ScopedContext Instance constructed.
*/
- public static Instance where(Map<String, ?> map) {
- if (map != null && !map.isEmpty()) {
- Map<String, Object> objectMap = new HashMap<>();
- if (getContext().isPresent()) {
- objectMap.putAll(getContext().get().contextMap);
- }
- map.forEach((key, value) -> {
- if (value == null || (value instanceof String && ((String) value).isEmpty())) {
- objectMap.remove(key);
- } else {
- objectMap.put(key, value);
- }
- });
- return new Instance(objectMap);
- } else {
- return getContext().isPresent() ? getContext().get() : new Instance();
- }
+ public static Instance where(final Map<String, ?> map) {
+ return provider.newScopedContext(map);
}
/**
* Creates a ScopedContext with a single key/value pair and calls a method.
* @param key the key.
- * @param obj the value associated with the key.
- * @param op the Runnable to call.
+ * @param value the value associated with the key.
+ * @param task the Runnable to call.
*/
- public static void runWhere(String key, Object obj, Runnable op) {
- if (obj != null) {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.put(key, obj);
- new Instance(map).run(op);
- } else {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.remove(key);
- new Instance(map).run(op);
- }
+ public static void runWhere(final String key, final Object value, final Runnable task) {
+ provider.newScopedContext(key, value).run(task);
}
/**
* Creates a ScopedContext with a single key/value pair and calls a method on a separate Thread.
* @param key the key.
- * @param obj the value associated with the key.
+ * @param value the value associated with the key.
* @param executorService the ExecutorService to dispatch the work.
- * @param op the Runnable to call.
+ * @param task the Runnable to call.
*/
- public static Future<?> runWhere(String key, Object obj, ExecutorService executorService, Runnable op) {
- if (obj != null) {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.put(key, obj);
- if (executorService != null) {
- return executorService.submit(new Runner(
- new Instance(map), ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- } else {
- new Instance(map).run(op);
- return CompletableFuture.completedFuture(0);
- }
- } else {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.remove(key);
- if (executorService != null) {
- return executorService.submit(new Runner(
- new Instance(map), ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- } else {
- new Instance(map).run(op);
- return CompletableFuture.completedFuture(0);
- }
- }
+ public static Future<Void> runWhere(
+ final String key, final Object value, final ExecutorService executorService, final Runnable task) {
+ return provider.newScopedContext(key, value).run(executorService, task);
}
/**
* Creates a ScopedContext with a Map of keys and values and calls a method.
* @param map the Map.
- * @param op the Runnable to call.
+ * @param task the Runnable to call.
*/
- public static void runWhere(Map<String, ?> map, Runnable op) {
- if (map != null && !map.isEmpty()) {
- Map<String, Object> objectMap = new HashMap<>();
- if (getContext().isPresent()) {
- objectMap.putAll(getContext().get().contextMap);
- }
- objectMap.putAll(map);
- new Instance(objectMap).run(op);
- } else {
- op.run();
- }
+ public static void runWhere(final Map<String, ?> map, final Runnable task) {
+ provider.newScopedContext(map).run(task);
}
/**
* Creates a ScopedContext with a single key/value pair and calls a method.
* @param key the key.
- * @param obj the value associated with the key.
- * @param op the Runnable to call.
+ * @param value the value associated with the key.
+ * @param task the Runnable to call.
*/
- public static <R> R callWhere(String key, Object obj, Callable<R> op) throws Exception {
- if (obj != null) {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.put(key, obj);
- return new Instance(map).call(op);
- } else {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.remove(key);
- return new Instance(map).call(op);
- }
+ public static <R> R callWhere(final String key, final Object value, final Callable<R> task) throws Exception {
+ return provider.newScopedContext(key, value).call(task);
}
/**
* Creates a ScopedContext with a single key/value pair and calls a method on a separate Thread.
* @param key the key.
- * @param obj the value associated with the key.
+ * @param value the value associated with the key.
* @param executorService the ExecutorService to dispatch the work.
- * @param op the Callable to call.
+ * @param task the Callable to call.
*/
- public static <R> Future<R> callWhere(String key, Object obj, ExecutorService executorService, Callable<R> op)
- throws Exception {
- if (obj != null) {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.put(key, obj);
- if (executorService != null) {
- return executorService.submit(new Caller<R>(
- new Instance(map), ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- } else {
- R ret = new Instance(map).call(op);
- return CompletableFuture.completedFuture(ret);
- }
- } else {
- if (executorService != null) {
- Map<String, Object> map = new HashMap<>();
- if (getContext().isPresent()) {
- map.putAll(getContext().get().contextMap);
- }
- map.remove(key);
- return executorService.submit(new Caller<R>(
- new Instance(map), ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- } else {
- R ret = op.call();
- return CompletableFuture.completedFuture(ret);
- }
- }
+ public static <R> Future<R> callWhere(
+ final String key, final Object value, final ExecutorService executorService, final Callable<R> task) {
+ return provider.newScopedContext(key, value).call(executorService, task);
}
/**
* Creates a ScopedContext with a Map of keys and values and calls a method.
* @param map the Map.
- * @param op the Runnable to call.
+ * @param task the Runnable to call.
*/
- public static <R> R callWhere(Map<String, ?> map, Callable<R> op) throws Exception {
- if (map != null && !map.isEmpty()) {
- Map<String, Object> objectMap = new HashMap<>();
- if (getContext().isPresent()) {
- objectMap.putAll(getContext().get().contextMap);
- }
- objectMap.putAll(map);
- return new Instance(objectMap).call(op);
- } else {
- return op.call();
- }
+ public static <R> R callWhere(final Map<String, ?> map, final Callable<R> task) throws Exception {
+ return provider.newScopedContext(map).call(task);
}
- public static class Instance {
-
- private final Instance parent;
- private final String key;
- private final Object value;
- private final Map<String, Object> contextMap;
-
- private Instance() {
- this.parent = null;
- this.key = null;
- this.value = null;
- this.contextMap = null;
- }
-
- private Instance(Map<String, Object> map) {
- this.parent = null;
- this.key = null;
- this.value = null;
- this.contextMap = map;
- }
-
- private Instance(Instance parent, String key, Object value) {
- this.parent = parent;
- this.key = key;
- this.value = value;
- this.contextMap = null;
- }
+ /**
+ * A holder of scoped context data.
+ */
+ public interface Instance {
/**
* Adds a key/value pair to the ScopedContext being constructed.
@@ -413,9 +159,7 @@ public class ScopedContext {
* @param value the value associated with the key.
* @return the ScopedContext being constructed.
*/
- public Instance where(String key, Object value) {
- return addObject(key, value);
- }
+ Instance where(String key, Object value);
/**
* Adds a key/value pair to the ScopedContext being constructed.
@@ -424,158 +168,37 @@ public class ScopedContext {
* @param supplier the function to generate the value.
* @return the ScopedContext being constructed.
*/
- public Instance where(String key, Supplier<Object> supplier) {
- return addObject(key, supplier.get());
- }
-
- private Instance addObject(String key, Object obj) {
- if (obj != null) {
- return new Instance(this, key, obj);
- }
- return this;
- }
+ Instance where(String key, Supplier<Object> supplier);
/**
* Executes a code block that includes all the key/value pairs added to the ScopedContext.
*
- * @param op the code block to execute.
+ * @param task the code block to execute.
*/
- public void run(Runnable op) {
- new Runner(this, null, null, op).run();
- }
+ void run(Runnable task);
/**
* Executes a code block that includes all the key/value pairs added to the ScopedContext on a different Thread.
*
- * @param op the code block to execute.
+ * @param task the code block to execute.
* @return a Future representing pending completion of the task
*/
- public Future<?> run(ExecutorService executorService, Runnable op) {
- return executorService.submit(
- new Runner(this, ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- }
+ Future<Void> run(ExecutorService executorService, Runnable task);
/**
* Executes a code block that includes all the key/value pairs added to the ScopedContext.
*
- * @param op the code block to execute.
+ * @param task the code block to execute.
* @return the return value from the code block.
*/
- public <R> R call(Callable<R> op) throws Exception {
- return new Caller<R>(this, null, null, op).call();
- }
+ <R> R call(Callable<R> task) throws Exception;
/**
* Executes a code block that includes all the key/value pairs added to the ScopedContext on a different Thread.
*
- * @param op the code block to execute.
+ * @param task the code block to execute.
* @return a Future representing pending completion of the task
*/
- public <R> Future<R> call(ExecutorService executorService, Callable<R> op) {
- return executorService.submit(
- new Caller<R>(this, ThreadContext.getContext(), ThreadContext.getImmutableStack(), op));
- }
- }
-
- private static class Runner implements Runnable {
- private final Map<String, Object> contextMap = new HashMap<>();
- private final Map<String, String> threadContextMap;
- private final ThreadContext.ContextStack contextStack;
- private final Instance context;
- private final Runnable op;
-
- public Runner(
- Instance context,
- Map<String, String> threadContextMap,
- ThreadContext.ContextStack contextStack,
- Runnable op) {
- this.context = context;
- this.threadContextMap = threadContextMap;
- this.contextStack = contextStack;
- this.op = op;
- }
-
- @Override
- public void run() {
- Instance scopedContext = context;
- // If the current context has a Map then we can just use it.
- if (context.contextMap == null) {
- do {
- if (scopedContext.contextMap != null) {
- // Once we hit a scope with an already populated Map we won't need to go any further.
- contextMap.putAll(scopedContext.contextMap);
- break;
- } else if (scopedContext.key != null) {
- contextMap.putIfAbsent(scopedContext.key, scopedContext.value);
- }
- scopedContext = scopedContext.parent;
- } while (scopedContext != null);
- scopedContext = new Instance(contextMap);
- }
- if (threadContextMap != null && !threadContextMap.isEmpty()) {
- ThreadContext.putAll(threadContextMap);
- }
- if (contextStack != null) {
- ThreadContext.setStack(contextStack);
- }
- addScopedContext(scopedContext);
- try {
- op.run();
- } finally {
- removeScopedContext();
- ThreadContext.clearAll();
- }
- }
- }
-
- private static class Caller<R> implements Callable<R> {
- private final Map<String, Object> contextMap = new HashMap<>();
- private final Instance context;
- private final Map<String, String> threadContextMap;
- private final ThreadContext.ContextStack contextStack;
- private final Callable<R> op;
-
- public Caller(
- Instance context,
- Map<String, String> threadContextMap,
- ThreadContext.ContextStack contextStack,
- Callable<R> op) {
- this.context = context;
- this.threadContextMap = threadContextMap;
- this.contextStack = contextStack;
- this.op = op;
- }
-
- @Override
- public R call() throws Exception {
- Instance scopedContext = context;
- // If the current context has a Map then we can just use it.
- if (context.contextMap == null) {
- do {
- if (scopedContext.contextMap != null) {
- // Once we hit a scope with an already populated Map we won't need to go any further.
- contextMap.putAll(scopedContext.contextMap);
- break;
- } else if (scopedContext.key != null) {
- contextMap.putIfAbsent(scopedContext.key, scopedContext.value);
- }
- scopedContext = scopedContext.parent;
- } while (scopedContext != null);
- scopedContext = new Instance(contextMap);
- }
- if (threadContextMap != null && !threadContextMap.isEmpty()) {
- ThreadContext.putAll(threadContextMap);
- }
- if (contextStack != null) {
- ThreadContext.setStack(contextStack);
- }
- addScopedContext(scopedContext);
- try {
- return op.call();
- } finally {
- removeScopedContext();
- ThreadContext.clearAll();
- }
- }
+ <R> Future<R> call(ExecutorService executorService, Callable<R> task);
}
}
diff --git a/log4j-api/src/main/java/org/apache/logging/log4j/simple/SimpleLogger.java b/log4j-api/src/main/java/org/apache/logging/log4j/simple/SimpleLogger.java
index 053ac45dcb..1690893187 100644
--- a/log4j-api/src/main/java/org/apache/logging/log4j/simple/SimpleLogger.java
+++ b/log4j-api/src/main/java/org/apache/logging/log4j/simple/SimpleLogger.java
@@ -21,11 +21,9 @@ import java.io.PrintStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
-import java.util.HashMap;
import java.util.Map;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Marker;
-import org.apache.logging.log4j.ScopedContext;
import org.apache.logging.log4j.ThreadContext;
import org.apache.logging.log4j.message.Message;
import org.apache.logging.log4j.message.MessageFactory;
@@ -296,9 +294,8 @@ public class SimpleLogger extends AbstractLogger {
}
sb.append(msg.getFormattedMessage());
if (showContextMap) {
- final Map<String, String> mdc = new HashMap<>(ThreadContext.getImmutableContext());
- ScopedContext.getContextMap().forEach((key, value) -> mdc.put(key, value.toString()));
- if (!mdc.isEmpty()) {
+ final Map<String, String> mdc = ThreadContext.getImmutableContext();
+ if (mdc.size() > 0) {
sb.append(SPACE);
sb.append(mdc.toString());
sb.append(SPACE);
diff --git a/log4j-api/src/main/java/org/apache/logging/log4j/spi/Provider.java b/log4j-api/src/main/java/org/apache/logging/log4j/spi/Provider.java
index bca1a9ecae..3eff6e8b3d 100644
--- a/log4j-api/src/main/java/org/apache/logging/log4j/spi/Provider.java
+++ b/log4j-api/src/main/java/org/apache/logging/log4j/spi/Provider.java
@@ -434,6 +434,13 @@ public class Provider {
return threadContextMapLazy.get();
}
+ /**
+ * @return An implementation of the {@link ScopedContextProvider} service to use.
+ */
+ public ScopedContextProvider getScopedContextProvider() {
+ return ScopedContextProvider.noop();
+ }
+
/**
* Gets the URL containing this Provider's Log4j details.
*
diff --git a/log4j-api/src/main/java/org/apache/logging/log4j/spi/ScopedContextProvider.java b/log4j-api/src/main/java/org/apache/logging/log4j/spi/ScopedContextProvider.java
new file mode 100644
index 0000000000..e2281e3c34
--- /dev/null
+++ b/log4j-api/src/main/java/org/apache/logging/log4j/spi/ScopedContextProvider.java
@@ -0,0 +1,81 @@
+/*
+ * 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.logging.log4j.spi;
+
+import java.util.Map;
+import org.apache.logging.log4j.ScopedContext;
+import org.apache.logging.log4j.spi.internal.NoopScopedContextProvider;
+import org.apache.logging.log4j.util.StringMap;
+
+/**
+ * The service underlying {@link ScopedContext}.
+ * @since 2.24.0
+ */
+public interface ScopedContextProvider {
+
+ static ScopedContextProvider noop() {
+ return NoopScopedContextProvider.SCOPED_CONTEXT_PROVIDER_INSTANCE;
+ }
+
+ /**
+ * @return An immutable map with the current context data.
+ */
+ Map<String, ?> getContextMap();
+
+ /**
+ * Adds the current data to the provided {@link StringMap}.
+ * @param map The {@link StringMap} to add data to.
+ */
+ default void addContextMapTo(final StringMap map) {
+ getContextMap().forEach(map::putValue);
+ }
+
+ /**
+ * Return the value of the key from the current ScopedContext, if there is one and the key exists.
+ * @param key The key.
+ * @return The value of the key in the current ScopedContext.
+ */
+ Object getValue(String key);
+
+ /**
+ * Return the value of the key from the current ScopedContext, if there is one and the key exists.
+ * @param key The key.
+ * @return The value of the key in the current ScopedContext converted to {@link String}.
+ */
+ String getString(String key);
+
+ /**
+ * Creates a new context containing the current context data from {@link org.apache.logging.log4j.ThreadContext}.
+ * @return A new instance of a scoped context.
+ */
+ ScopedContext.Instance newScopedContext();
+
+ /**
+ * Creates a new context containing the current context data from {@link org.apache.logging.log4j.ThreadContext}.
+ * @param key An additional key for the context.
+ * @param value An additional value for the context.
+ * @return A new instance of a scoped context.
+ */
+ ScopedContext.Instance newScopedContext(String key, Object value);
+
+ /**
+ * Creates a new context containing the current context data from {@link org.apache.logging.log4j.ThreadContext}.
+ * @param map Additional data to include in the context.
+ * @return A new instance of a scoped context.
+ */
+ ScopedContext.Instance newScopedContext(Map<String, ?> map);
+}
diff --git a/log4j-api/src/main/java/org/apache/logging/log4j/spi/internal/NoopScopedContextProvider.java b/log4j-api/src/main/java/org/apache/logging/log4j/spi/internal/NoopScopedContextProvider.java
new file mode 100644
index 0000000000..65c5376102
--- /dev/null
+++ b/log4j-api/src/main/java/org/apache/logging/log4j/spi/internal/NoopScopedContextProvider.java
@@ -0,0 +1,99 @@
+/*
+ * 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.logging.log4j.spi.internal;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.function.Supplier;
+import org.apache.logging.log4j.ScopedContext;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+
+/**
+ * An implementation of {@link ScopedContextProvider} that does not propagate any data.
+ * @since 2.24.0
+ */
+public class NoopScopedContextProvider implements ScopedContextProvider {
+
+ private static final ScopedContext.Instance SCOPED_CONTEXT_INSTANCE = new NoopInstance();
+ public static final ScopedContextProvider SCOPED_CONTEXT_PROVIDER_INSTANCE = new NoopScopedContextProvider();
+
+ @Override
+ public Map<String, ?> getContextMap() {
+ return Collections.emptyMap();
+ }
+
+ @Override
+ public Object getValue(final String key) {
+ return null;
+ }
+
+ @Override
+ public String getString(final String key) {
+ return null;
+ }
+
+ @Override
+ public ScopedContext.Instance newScopedContext() {
+ return SCOPED_CONTEXT_INSTANCE;
+ }
+
+ @Override
+ public ScopedContext.Instance newScopedContext(final String key, final Object value) {
+ return SCOPED_CONTEXT_INSTANCE;
+ }
+
+ @Override
+ public ScopedContext.Instance newScopedContext(final Map<String, ?> map) {
+ return SCOPED_CONTEXT_INSTANCE;
+ }
+
+ private static class NoopInstance implements ScopedContext.Instance {
+
+ @Override
+ public ScopedContext.Instance where(final String key, final Object value) {
+ return this;
+ }
+
+ @Override
+ public ScopedContext.Instance where(final String key, final Supplier<Object> supplier) {
+ return this;
+ }
+
+ @Override
+ public void run(final Runnable task) {
+ task.run();
+ }
+
+ @Override
+ public Future<Void> run(final ExecutorService executorService, final Runnable task) {
+ return executorService.submit(task, null);
+ }
+
+ @Override
+ public <R> R call(final Callable<R> task) throws Exception {
+ return task.call();
+ }
+
+ @Override
+ public <R> Future<R> call(final ExecutorService executorService, final Callable<R> task) {
+ return executorService.submit(task);
+ }
+ }
+}
diff --git a/log4j-core-test/src/test/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProviderTest.java b/log4j-core-test/src/test/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProviderTest.java
new file mode 100644
index 0000000000..2ca67c1e23
--- /dev/null
+++ b/log4j-core-test/src/test/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProviderTest.java
@@ -0,0 +1,57 @@
+/*
+ * 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.logging.log4j.core.impl.internal;
+
+import org.apache.logging.log4j.test.spi.ScopedContextProviderSuite;
+import org.junit.jupiter.api.Test;
+
+class DefaultScopedContextProviderTest extends ScopedContextProviderSuite {
+
+ private static DefaultScopedContextProvider createProvider() {
+ return new DefaultScopedContextProvider();
+ }
+
+ @Test
+ void testScope() {
+ testScope(createProvider());
+ }
+
+ @Test
+ void testRunWhere() {
+ testRunWhere(createProvider());
+ }
+
+ @Test
+ void testRunThreads() {
+ testRunThreads(createProvider());
+ }
+
+ @Test
+ void testThreads() throws Exception {
+ testThreads(createProvider());
+ }
+
+ @Test
+ void testThreadException() throws Exception {
+ testThreadException(createProvider());
+ }
+
+ @Test
+ void testThreadCall() throws Exception {
+ testThreadCall(createProvider());
+ }
+}
diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/Log4jProvider.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/Log4jProvider.java
index bd0b62337c..cd4ddfbe32 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/Log4jProvider.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/Log4jProvider.java
@@ -17,15 +17,32 @@
package org.apache.logging.log4j.core.impl;
import aQute.bnd.annotation.Resolution;
+import aQute.bnd.annotation.spi.ServiceConsumer;
import aQute.bnd.annotation.spi.ServiceProvider;
+import java.util.ServiceLoader;
+import org.apache.logging.log4j.core.impl.internal.DefaultScopedContextProvider;
import org.apache.logging.log4j.spi.Provider;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+import org.apache.logging.log4j.status.StatusLogger;
+import org.apache.logging.log4j.util.ServiceLoaderUtil;
/**
* Binding for the Log4j API.
*/
@ServiceProvider(value = Provider.class, resolution = Resolution.OPTIONAL)
+@ServiceConsumer(value = ScopedContextProvider.class, resolution = Resolution.OPTIONAL)
public class Log4jProvider extends Provider {
public Log4jProvider() {
super(10, CURRENT_VERSION, Log4jContextFactory.class);
}
+
+ @Override
+ public ScopedContextProvider getScopedContextProvider() {
+ return ServiceLoaderUtil.safeStream(
+ ScopedContextProvider.class,
+ ServiceLoader.load(ScopedContextProvider.class),
+ StatusLogger.getLogger())
+ .findFirst()
+ .orElse(DefaultScopedContextProvider.INSTANCE);
+ }
}
diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/ScopedContextDataProvider.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/ScopedContextDataProvider.java
index 653e17b7cd..948d9c04b6 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/ScopedContextDataProvider.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/ScopedContextDataProvider.java
@@ -21,8 +21,9 @@ import aQute.bnd.annotation.spi.ServiceProvider;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
-import org.apache.logging.log4j.ScopedContext;
import org.apache.logging.log4j.core.util.ContextDataProvider;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+import org.apache.logging.log4j.util.ProviderUtil;
/**
* ContextDataProvider for {@code Map<String, String>} data.
@@ -31,16 +32,19 @@ import org.apache.logging.log4j.core.util.ContextDataProvider;
@ServiceProvider(value = ContextDataProvider.class, resolution = Resolution.OPTIONAL)
public class ScopedContextDataProvider implements ContextDataProvider {
+ private final ScopedContextProvider scopedContext =
+ ProviderUtil.getProvider().getScopedContextProvider();
+
@Override
- public String get(String key) {
- return ScopedContext.getString(key);
+ public String get(final String key) {
+ return scopedContext.getString(key);
}
@Override
public Map<String, String> supplyContextData() {
- Map<String, Object> contextMap = ScopedContext.getContextMap();
+ final Map<String, ?> contextMap = scopedContext.getContextMap();
if (!contextMap.isEmpty()) {
- Map<String, String> map = new HashMap<>();
+ final Map<String, String> map = new HashMap<>();
contextMap.forEach((key, value) -> map.put(key, value.toString()));
return map;
} else {
@@ -50,11 +54,11 @@ public class ScopedContextDataProvider implements ContextDataProvider {
@Override
public int size() {
- return ScopedContext.size();
+ return scopedContext.getContextMap().size();
}
@Override
- public void addAll(Map<String, String> map) {
- ScopedContext.addAll(map);
+ public void addAll(final Map<String, String> map) {
+ scopedContext.getContextMap().forEach((key, value) -> map.put(key, String.valueOf(value)));
}
}
diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProvider.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProvider.java
new file mode 100644
index 0000000000..ea9465337d
--- /dev/null
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/impl/internal/DefaultScopedContextProvider.java
@@ -0,0 +1,389 @@
+/*
+ * 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.logging.log4j.core.impl.internal;
+
+import java.util.ArrayDeque;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.function.Supplier;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.ScopedContext;
+import org.apache.logging.log4j.ThreadContext;
+import org.apache.logging.log4j.spi.ScopedContextProvider;
+import org.apache.logging.log4j.status.StatusLogger;
+import org.apache.logging.log4j.util.StringMap;
+
+public class DefaultScopedContextProvider implements ScopedContextProvider {
+
+ public static final Logger LOGGER = StatusLogger.getLogger();
+ public static final ScopedContextProvider INSTANCE = new DefaultScopedContextProvider();
+
+ private final ThreadLocal<Deque<Instance>> scopedContext = new ThreadLocal<>();
+
+ private final Instance EMPTY_INSTANCE = new Instance(this);
+
+ /**
+ * Returns an immutable Map containing all the key/value pairs as Object objects.
+ * @return An immutable copy of the Map at the current scope.
+ */
+ private Optional<Instance> getContext() {
+ final Deque<Instance> stack = scopedContext.get();
+ return stack != null ? Optional.of(stack.getFirst()) : Optional.empty();
+ }
+
+ /**
+ * Add the ScopeContext.
+ * @param context The ScopeContext.
+ */
+ private void addScopedContext(final Instance context) {
+ Deque<Instance> stack = scopedContext.get();
+ if (stack == null) {
+ stack = new ArrayDeque<>();
+ scopedContext.set(stack);
+ }
+ stack.addFirst(context);
+ }
+
+ /**
+ * Remove the top ScopeContext.
+ */
+ private void removeScopedContext() {
+ final Deque<Instance> stack = scopedContext.get();
+ if (stack != null) {
+ if (!stack.isEmpty()) {
+ stack.removeFirst();
+ }
+ if (stack.isEmpty()) {
+ scopedContext.remove();
+ }
+ }
+ }
+
+ @Override
+ public Map<String, ?> getContextMap() {
+ final Optional<Instance> context = getContext();
+ return context.isPresent()
+ && context.get().contextMap != null
+ && !context.get().contextMap.isEmpty()
+ ? Collections.unmodifiableMap(context.get().contextMap)
+ : Collections.emptyMap();
+ }
+
+ /**
+ * Return the value of the key from the current ScopedContext, if there is one and the key exists.
+ * @param key The key.
+ * @return The value of the key in the current ScopedContext.
+ */
+ @Override
+ public Object getValue(final String key) {
+ final Optional<Instance> context = getContext();
+ return context.map(instance -> instance.contextMap)
+ .map(map -> map.get(key))
+ .orElse(null);
+ }
+
+ /**
+ * Return String value of the key from the current ScopedContext, if there is one and the key exists.
+ * @param key The key.
+ * @return The value of the key in the current ScopedContext.
+ */
+ @Override
+ public String getString(final String key) {
+ final Optional<Instance> context = getContext();
+ if (context.isPresent()) {
+ final Object obj = context.get().contextMap.get(key);
+ if (obj != null) {
+ return obj.toString();
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Adds all the String rendered objects in the context map to the provided Map.
+ * @param map The Map to add entries to.
+ */
+ @Override
+ public void addContextMapTo(final StringMap map) {
+ final Optional<Instance> context = getContext();
+ if (context.isPresent()) {
+ final Map<String, ?> contextMap = context.get().contextMap;
+ if (contextMap != null && !contextMap.isEmpty()) {
+ contextMap.forEach((key, value) -> map.putValue(key, value.toString()));
+ }
+ }
+ }
+
+ @Override
+ public ScopedContext.Instance newScopedContext() {
+ return getContext().isPresent() ? getContext().get() : EMPTY_INSTANCE;
+ }
+
+ /**
+ * Creates a ScopedContext Instance with a key/value pair.
+ *
+ * @param key the key to add.
+ * @param value the value associated with the key.
+ * @return the Instance constructed if a valid key and value were provided. Otherwise, either the
+ * current Instance is returned or a new Instance is created if there is no current Instance.
+ */
+ @Override
+ public ScopedContext.Instance newScopedContext(final String key, final Object value) {
+ if (value != null) {
+ final Instance parent = getContext().isPresent() ? getContext().get() : EMPTY_INSTANCE;
+ return new Instance(parent, key, value);
+ } else {
+ if (getContext().isPresent()) {
+ final Map<String, ?> map = getContextMap();
+ map.remove(key);
+ return new Instance(this, map);
+ }
+ }
+ return newScopedContext();
+ }
+
+ /**
+ * Creates a ScopedContext Instance with a Map of keys and values.
+ * @param map the Map.
+ * @return the ScopedContext Instance constructed.
+ */
+ @Override
+ public ScopedContext.Instance newScopedContext(final Map<String, ?> map) {
+ if (map != null && !map.isEmpty()) {
+ final Map<String, Object> objectMap = new HashMap<>();
+ if (getContext().isPresent()) {
+ objectMap.putAll(getContext().get().contextMap);
+ }
+ map.forEach((key, value) -> {
+ if (value == null || (value instanceof String && ((String) value).isEmpty())) {
+ objectMap.remove(key);
+ } else {
+ objectMap.put(key, value);
+ }
+ });
+ return new Instance(this, objectMap);
+ } else {
+ return getContext().isPresent() ? getContext().get() : EMPTY_INSTANCE;
+ }
+ }
+
+ private static void setupContext(
+ final Map<String, Object> contextMap,
+ final Map<String, String> threadContextMap,
+ final Collection<String> contextStack,
+ final Instance context) {
+ Instance scopedContext = context;
+ // If the current context has a Map then we can just use it.
+ if (context.contextMap == null) {
+ do {
+ if (scopedContext.contextMap != null) {
+ // Once we hit a scope with an already populated Map we won't need to go any further.
+ contextMap.putAll(scopedContext.contextMap);
+ break;
+ } else if (scopedContext.key != null) {
+ contextMap.putIfAbsent(scopedContext.key, scopedContext.value);
+ }
+ scopedContext = scopedContext.parent;
+ } while (scopedContext != null);
+ scopedContext = new Instance(context.getProvider(), contextMap);
+ }
+ if (threadContextMap != null && !threadContextMap.isEmpty()) {
+ ThreadContext.putAll(threadContextMap);
+ }
+ if (contextStack != null) {
+ ThreadContext.setStack(contextStack);
+ }
+ context.getProvider().addScopedContext(scopedContext);
+ }
+
+ private static final class Instance implements ScopedContext.Instance {
+
+ private final DefaultScopedContextProvider provider;
+ private final Instance parent;
+ private final String key;
+ private final Object value;
+ private final Map<String, ?> contextMap;
+
+ private Instance(final DefaultScopedContextProvider provider) {
+ this.provider = provider;
+ parent = null;
+ key = null;
+ value = null;
+ contextMap = null;
+ }
+
+ private Instance(final DefaultScopedContextProvider provider, final Map<String, ?> map) {
+ this.provider = provider;
+ parent = null;
+ key = null;
+ value = null;
+ contextMap = map;
+ }
+
+ private Instance(final Instance parent, final String key, final Object value) {
+ provider = parent.getProvider();
+ this.parent = parent;
+ this.key = key;
+ this.value = value;
+ contextMap = null;
+ }
+
+ /**
+ * Adds a key/value pair to the ScopedContext being constructed.
+ *
+ * @param key the key to add.
+ * @param value the value associated with the key.
+ * @return the ScopedContext being constructed.
+ */
+ @Override
+ public Instance where(final String key, final Object value) {
+ return addObject(key, value);
+ }
+
+ /**
+ * Adds a key/value pair to the ScopedContext being constructed.
+ *
+ * @param key the key to add.
+ * @param supplier the function to generate the value.
+ * @return the ScopedContext being constructed.
+ */
+ @Override
+ public Instance where(final String key, final Supplier<Object> supplier) {
+ return addObject(key, supplier.get());
+ }
+
+ private Instance addObject(final String key, final Object obj) {
+ return obj != null ? new Instance(this, key, obj) : this;
+ }
+
+ /**
+ * Executes a code block that includes all the key/value pairs added to the ScopedContext.
+ *
+ * @param task the code block to execute.
+ */
+ @Override
+ public void run(final Runnable task) {
+ new Runner(this, null, null, task).run();
+ }
+
+ /**
+ * Executes a code block that includes all the key/value pairs added to the ScopedContext on a different Thread.
+ *
+ * @param task the code block to execute.
+ * @return a Future representing pending completion of the task
+ */
+ @Override
+ public Future<Void> run(final ExecutorService executorService, final Runnable task) {
+ return executorService.submit(
+ new Runner(this, ThreadContext.getContext(), ThreadContext.getImmutableStack(), task), null);
+ }
+
+ /**
+ * Executes a code block that includes all the key/value pairs added to the ScopedContext.
+ *
+ * @param task the code block to execute.
+ * @return the return value from the code block.
+ */
+ @Override
+ public <R> R call(final Callable<R> task) throws Exception {
+ return new Caller<>(this, null, null, task).call();
+ }
+
+ /**
+ * Executes a code block that includes all the key/value pairs added to the ScopedContext on a different Thread.
+ *
+ * @param task the code block to execute.
+ * @return a Future representing pending completion of the task
+ */
+ @Override
+ public <R> Future<R> call(final ExecutorService executorService, final Callable<R> task) {
+ return executorService.submit(
+ new Caller<>(this, ThreadContext.getContext(), ThreadContext.getImmutableStack(), task));
+ }
+
+ private DefaultScopedContextProvider getProvider() {
+ return provider;
+ }
+ }
+
+ private static class Runner implements Runnable {
+ private final Map<String, Object> contextMap = new HashMap<>();
+ private final Map<String, String> threadContextMap;
+ private final ThreadContext.ContextStack contextStack;
+ private final Instance context;
+ private final Runnable op;
+
+ public Runner(
+ final Instance context,
+ final Map<String, String> threadContextMap,
+ final ThreadContext.ContextStack contextStack,
+ final Runnable op) {
+ this.context = context;
+ this.threadContextMap = threadContextMap;
+ this.contextStack = contextStack;
+ this.op = op;
+ }
+
+ @Override
+ public void run() {
+ setupContext(contextMap, threadContextMap, contextStack, context);
+ try {
+ op.run();
+ } finally {
+ context.getProvider().removeScopedContext();
+ ThreadContext.clearAll();
+ }
+ }
+ }
+
+ private static class Caller<R> implements Callable<R> {
+ private final Map<String, Object> contextMap = new HashMap<>();
+ private final Instance context;
+ private final Map<String, String> threadContextMap;
+ private final ThreadContext.ContextStack contextStack;
+ private final Callable<R> op;
+
+ public Caller(
+ final Instance context,
+ final Map<String, String> threadContextMap,
+ final ThreadContext.ContextStack contextStack,
+ final Callable<R> op) {
+ this.context = context;
+ this.threadContextMap = threadContextMap;
+ this.contextStack = contextStack;
+ this.op = op;
+ }
+
+ @Override
+ public R call() throws Exception {
+ setupContext(contextMap, threadContextMap, contextStack, context);
+ try {
+ return op.call();
+ } finally {
+ context.getProvider().removeScopedContext();
+ ThreadContext.clearAll();
+ }
+ }
+ }
+}