Add sangria-slf4j module.

3 files changed, 148 insertions, 0 deletions

diff --git a/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/SangriaSlf4jModule.java b/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/SangriaSlf4jModule.java
new file mode 100644
index 0000000..9be0f8a
--- /dev/null
+++ b/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/SangriaSlf4jModule.java
@@ -0,0 +1,33 @@
+/*********************************************************************
+ * Sangria                                                           *
+ * Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com>      *
+ *                                                                   *
+ * This library is free software. It comes without any warranty, to  *
+ * the extent permitted by applicable law. You can redistribute it   *
+ * and/or modify it under the terms of the Do What The Fuck You Want *
+ * To Public License, Version 2, as published by Sam Hocevar. See    *
+ * the COPYING file or http://www.wtfpl.net/ for more details.       *
+ *********************************************************************/
+
+package com.tavianator.sangria.slf4j;
+
+import com.google.inject.AbstractModule;
+import org.slf4j.Logger;
+
+import com.tavianator.sangria.contextual.ContextSensitiveBinder;
+
+/**
+ * Module for SLF4J {@link Logger} injection.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.0
+ * @since 1.0
+ */
+public class SangriaSlf4jModule extends AbstractModule {
+    @Override
+    protected void configure() {
+        ContextSensitiveBinder.create(binder())
+                .bind(Logger.class)
+                .toContextSensitiveProvider(Slf4jLoggerProvider.class);
+    }
+}
diff --git a/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/Slf4jLoggerProvider.java b/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/Slf4jLoggerProvider.java
new file mode 100644
index 0000000..cae4836
--- /dev/null
+++ b/sangria-slf4j/src/main/java/com/tavianator/sangria/slf4j/Slf4jLoggerProvider.java
@@ -0,0 +1,40 @@
+/*********************************************************************
+ * Sangria                                                           *
+ * Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com>      *
+ *                                                                   *
+ * This library is free software. It comes without any warranty, to  *
+ * the extent permitted by applicable law. You can redistribute it   *
+ * and/or modify it under the terms of the Do What The Fuck You Want *
+ * To Public License, Version 2, as published by Sam Hocevar. See    *
+ * the COPYING file or http://www.wtfpl.net/ for more details.       *
+ *********************************************************************/
+
+package com.tavianator.sangria.slf4j;
+
+import javax.inject.Singleton;
+
+import com.google.inject.spi.InjectionPoint;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.tavianator.sangria.contextual.ContextSensitiveProvider;
+
+/**
+ * Actual {@link Logger} provider implementation.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.0
+ * @since 1.0
+ */
+@Singleton
+class Slf4jLoggerProvider implements ContextSensitiveProvider<Logger> {
+    @Override
+    public Logger getInContext(InjectionPoint injectionPoint) {
+        return LoggerFactory.getLogger(injectionPoint.getDeclaringType().getRawType());
+    }
+
+    @Override
+    public Logger getInUnknownContext() {
+        return LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
+    }
+}
diff --git a/sangria-slf4j/src/test/java/com/tavianator/sangria/slf4j/SangriaSlf4jModuleTest.java b/sangria-slf4j/src/test/java/com/tavianator/sangria/slf4j/SangriaSlf4jModuleTest.java
new file mode 100644
index 0000000..254584b
--- /dev/null
+++ b/sangria-slf4j/src/test/java/com/tavianator/sangria/slf4j/SangriaSlf4jModuleTest.java
@@ -0,0 +1,75 @@
+/*********************************************************************
+ * Sangria                                                           *
+ * Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com>      *
+ *                                                                   *
+ * This library is free software. It comes without any warranty, to  *
+ * the extent permitted by applicable law. You can redistribute it   *
+ * and/or modify it under the terms of the Do What The Fuck You Want *
+ * To Public License, Version 2, as published by Sam Hocevar. See    *
+ * the COPYING file or http://www.wtfpl.net/ for more details.       *
+ *********************************************************************/
+
+package com.tavianator.sangria.slf4j;
+
+import javax.inject.Inject;
+import javax.inject.Provider;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.Provides;
+import org.junit.Before;
+import org.junit.Test;
+import org.slf4j.Logger;
+
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+
+/**
+ * Tests for {@link SangriaSlf4jModule}.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.0
+ * @since 1.0
+ */
+public class SangriaSlf4jModuleTest {
+    @Inject Logger logger;
+    @Inject Provider<Logger> provider;
+
+    @Before
+    public void setUp() {
+        Guice.createInjector(new SangriaSlf4jModule()).injectMembers(this);
+    }
+
+    @Test
+    public void testLogger() {
+        assertThat(logger.getName(), equalTo("com.tavianator.sangria.slf4j.SangriaSlf4jModuleTest"));
+    }
+
+    @Test
+    public void testProvider() {
+        assertThat(provider.get().getName(), equalTo(Logger.ROOT_LOGGER_NAME));
+    }
+
+    @Test
+    public void testProviderMethod() {
+        Injector injector = Guice.createInjector(new AbstractModule() {
+            @Override
+            protected void configure() {
+                install(new SangriaSlf4jModule());
+            }
+
+            @Provides
+            String getLoggerName(Logger logger) {
+                return logger.getName();
+            }
+        });
+
+        assertThat(injector.getInstance(String.class), equalTo(Logger.ROOT_LOGGER_NAME));
+    }
+
+    @Test
+    public void testDeDuplication() {
+        Guice.createInjector(new SangriaSlf4jModule(), new SangriaSlf4jModule());
+    }
+}