[LOGMGR-228] Reintroduce a way to parse properties and configure a Lo…

…gContext.

https://issues.jboss.org/browse/LOGMGR-228

ext/pom.xml

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ JBoss, Home of Professional Open Source.
+  ~
+  ~ Copyright 2018 Red Hat, Inc., and individual contributors
+  ~ as indicated by the @author tags.
+  ~
+  ~ 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
+  ~
+  ~     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.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>jboss-logmanager-parent</artifactId>
+        <groupId>org.jboss.logmanager</groupId>
+        <version>3.0.0.Final-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>jboss-logmanager-ext</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jboss.logging</groupId>
+            <artifactId>jboss-logging</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.jboss.logmanager</groupId>
+            <artifactId>jboss-logmanager</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jboss.modules</groupId>
+            <artifactId>jboss-modules</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.kohsuke.metainf-services</groupId>
+            <artifactId>metainf-services</artifactId>
+            <!-- Optional and provided as this is only a compile-time dependency -->
+            <optional>true</optional>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.wildfly.common</groupId>
+            <artifactId>wildfly-common</artifactId>
+        </dependency>
+
+        <!-- Test dependencies -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <configuration>
+                    <systemPropertyVariables>
+                        <config.dir>${project.build.testOutputDirectory}${file.separator}configs</config.dir>
+                        <log.dir>${project.build.directory}${file.separator}logs</log.dir>
+                    </systemPropertyVariables>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

ext/src/main/java/org/jboss/logmanager/ext/DefaultConfiguratorFactory.java

@@ -0,0 +1,43 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ *
+ * Copyright 2018 Red Hat, Inc., and individual contributors
+ * as indicated by the @author tags.
+ *
+ * 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
+ *
+ *     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.jboss.logmanager.ext;
+
+import org.jboss.logmanager.ConfiguratorFactory;
+import org.jboss.logmanager.LogContextConfigurator;
+import org.kohsuke.MetaInfServices;
+
+/**
+ * The default configuration factory which has a priority of 100.
+ *
+ * @author <a href="mailto:[email protected]">James R. Perkins</a>
+ */
+@MetaInfServices
+public class DefaultConfiguratorFactory implements ConfiguratorFactory {
+
+    @Override
+    public LogContextConfigurator create() {
+        return new DefaultLogContextConfigurator();
+    }
+
+    @Override
+    public int priority() {
+        return 100;
+    }
+}

ext/src/main/java/org/jboss/logmanager/ext/DefaultLogContextConfigurator.java

@@ -0,0 +1,107 @@
+/*
+ * JBoss, Home of Professional Open Source.
+ *
+ * Copyright 2018 Red Hat, Inc., and individual contributors
+ * as indicated by the @author tags.
+ *
+ * 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
+ *
+ *     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.jboss.logmanager.ext;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Iterator;
+import java.util.Properties;
+import java.util.ServiceLoader;
+import java.util.logging.Logger;
+
+import org.jboss.logmanager.Level;
+import org.jboss.logmanager.LogContext;
+import org.jboss.logmanager.LogContextConfigurator;
+import org.jboss.logmanager.StandardOutputStreams;
+import org.jboss.logmanager.formatters.PatternFormatter;
+import org.jboss.logmanager.handlers.ConsoleHandler;
+
+/**
+ * A default log context configuration.
+ * <p>
+ * If the {@linkplain #configure(LogContext, InputStream) input stream} is {@code null} an attempt is made to find a
+ * {@code logging.properties} file. If the file is not found, a {@linkplain java.util.ServiceLoader service loader} is
+ * used to find the first implementation of a {@link LogContextConfigurator}. If that fails a default
+ * {@link ConsoleHandler} is configured with the pattern {@code %d{yyyy-MM-dd'T'HH:mm:ssXXX} %-5p [%c] (%t) %s%e%n}.
+ * </p>
+ *
+ * <p>
+ * Locating the {@code logging.properties} happens in the following order:
+ * <ul>
+ * <li>The {@code logging.configuration} system property is checked</li>
+ * <li>The current threads {@linkplain ClassLoader#getResourceAsStream(String)}  class loader} for a {@code logging.properties}</li>
+ * <li>Finally {@link Class#getResourceAsStream(String)} is used to locate a {@code logging.properties}</li>
+ * </ul>
+ * </p>
+ *
+ * @author <a href="mailto:[email protected]">James R. Perkins</a>
+ */
+public class DefaultLogContextConfigurator implements LogContextConfigurator {
+
+    @Override
+    public void configure(final LogContext logContext, final InputStream inputStream) {
+        final InputStream configIn = inputStream != null ? inputStream : findConfiguration();
+
+        // Configure the log context based on a property file
+        if (configIn != null) {
+            final Properties properties = new Properties();
+            try (Reader reader = new InputStreamReader(configIn, StandardCharsets.UTF_8)) {
+                properties.load(reader);
+            } catch (IOException e) {
+                throw new RuntimeException("Failed to configure log manager with configuration file.", e);
+            }
+            PropertyConfigurator.configure(logContext, properties);
+        } else {
+            // Next check the service loader
+            final Iterator<LogContextConfigurator> serviceLoader = ServiceLoader.load(LogContextConfigurator.class).iterator();
+            if (serviceLoader.hasNext()) {
+                serviceLoader.next().configure(logContext, inputStream);
+            } else {
+                // Configure a default console handler, pattern formatter and associated with the root logger
+                final ConsoleHandler handler = new ConsoleHandler(new PatternFormatter("%d{yyyy-MM-dd'T'HH:mm:ssXXX} %-5p [%c] (%t) %s%e%n"));
+                handler.setLevel(Level.INFO);
+                handler.setAutoFlush(true);
+                final Logger rootLogger = logContext.getLogger("");
+                rootLogger.setLevel(Level.INFO);
+                rootLogger.addHandler(handler);
+            }
+        }
+    }
+
+    private static InputStream findConfiguration() {
+        final String propLoc = System.getProperty("logging.configuration");
+        if (propLoc != null) try {
+            return new URL(propLoc).openStream();
+        } catch (IOException e) {
+            StandardOutputStreams.printError("Unable to read the logging configuration from '%s' (%s)%n", propLoc, e);
+        }
+        final ClassLoader tccl = Thread.currentThread().getContextClassLoader();
+        if (tccl != null) try {
+            final InputStream stream = tccl.getResourceAsStream("logging.properties");
+            if (stream != null) return stream;
+        } catch (Exception ignore) {
+        }
+        return DefaultLogContextConfigurator.class.getResourceAsStream("logging.properties");
+    }
+}