diff --git a/guice-intro/pom.xml b/guice-intro/pom.xml new file mode 100644 index 0000000000..1f0d7679b7 --- /dev/null +++ b/guice-intro/pom.xml @@ -0,0 +1,34 @@ + + + 4.0.0 + com.baeldung.examples.guice + guice-intro + 1.0-SNAPSHOT + jar + + + com.google.inject + guice + ${guice.version} + + + + + + org.apache.maven.plugins + maven-compiler-plugin + + 1.8 + 1.8 + + + + + + UTF-8 + 1.8 + 1.8 + 4.1.0 + + guice-intro + diff --git a/guice-intro/src/main/java/com/baeldung/examples/RunGuice.java b/guice-intro/src/main/java/com/baeldung/examples/RunGuice.java new file mode 100644 index 0000000000..b4b3e8571e --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/RunGuice.java @@ -0,0 +1,36 @@ + +package com.baeldung.examples; + +import com.baeldung.examples.guice.Communication; +import com.baeldung.examples.guice.binding.AOPModule; +import com.baeldung.examples.guice.modules.BasicModule; +import com.google.inject.Guice; +import com.google.inject.Injector; +import java.util.Scanner; + +/** + * + * @author Baeldung + */ +public class RunGuice { + + public static void main(String[] args) { + Injector injector = Guice.createInjector(new BasicModule(), new AOPModule()); + Communication comms = injector.getInstance(Communication.class); + Scanner scanner = new Scanner(System.in); + System.out.println("Enter your message to be sent; press Q to quit and P to print the message log"); + while (true) { + String input = scanner.nextLine(); + if (input.equalsIgnoreCase("q")) { + System.exit(0); + } + if (input.equalsIgnoreCase("p")) { + comms.print(); + } else { + comms.sendMessage(input); + } + + } + + } +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/Communication.java b/guice-intro/src/main/java/com/baeldung/examples/guice/Communication.java new file mode 100644 index 0000000000..c4b17b57d2 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/Communication.java @@ -0,0 +1,57 @@ + +package com.baeldung.examples.guice; + +import com.google.inject.Inject; +import com.google.inject.name.Named; +import java.util.Date; +import java.util.LinkedList; +import java.util.Queue; +import java.util.logging.Logger; + +/** + * + * @author Baeldung + */ +public class Communication { + + final Date start = new Date(); + + @Inject + private Logger logger; + + private Queue messageLog; + + @Named("CommsUUID") + private String commsID; + + @Inject + private DefaultCommunicator communicator; + + public Communication(Boolean keepRecords) { + if (keepRecords) { + messageLog = new LinkedList(); + } + } + + public boolean sendMessage(String message) { + if (!message.isEmpty() && messageLog != null) { + messageLog.add(message); + } + return communicator.sendMessage(message); + } + + public void print() { + if (messageLog != null) { + for (String message : messageLog) { + logger.info(message); + } + } else { + logger.info("Message logging wasn't enabled"); + } + } + + public DefaultCommunicator getCommunicator() { + return this.communicator; + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/CommunicationMode.java b/guice-intro/src/main/java/com/baeldung/examples/guice/CommunicationMode.java new file mode 100644 index 0000000000..444b775478 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/CommunicationMode.java @@ -0,0 +1,12 @@ + +package com.baeldung.examples.guice; + +import com.baeldung.examples.guice.constant.CommunicationModel; + +public interface CommunicationMode { + + public CommunicationModel getMode(); + + public boolean sendMessage(String message); + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/DefaultCommunicator.java b/guice-intro/src/main/java/com/baeldung/examples/guice/DefaultCommunicator.java new file mode 100644 index 0000000000..423c24f789 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/DefaultCommunicator.java @@ -0,0 +1,48 @@ + +package com.baeldung.examples.guice; + +import com.baeldung.examples.guice.marker.Communicator; +import com.google.inject.Inject; +import com.google.inject.name.Named; + + +public class DefaultCommunicator implements Communicator { + + private CommunicationMode defaultCommsMode; + @Inject + @Named("SMSComms") + CommunicationMode smsCommsMode; + @Inject + @Named("EmailComms") + CommunicationMode emailCommsMode; + @Inject + @Named("IMComms") + CommunicationMode imCommsMode; + + protected DefaultCommunicator(CommunicationMode defaultComms) { + this.defaultCommsMode = defaultComms; + } + + public DefaultCommunicator() { + + } + + public boolean sendMessage(String message) { + boolean sent = false; + if (defaultCommsMode != null) { + sent = sendMessageByDefault(message); + } else { + sent = smsCommsMode.sendMessage(message); + } + return sent; + } + + private boolean sendMessageByDefault(String message) { + boolean sent = false; + if (message != null && !message.trim().equals("")) { + return defaultCommsMode.sendMessage(message); + } + return sent; + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/EmailCommunicationMode.java b/guice-intro/src/main/java/com/baeldung/examples/guice/EmailCommunicationMode.java new file mode 100644 index 0000000000..642ee7ace0 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/EmailCommunicationMode.java @@ -0,0 +1,23 @@ +package com.baeldung.examples.guice; + +import com.baeldung.examples.guice.aop.MessageSentLoggable; +import com.baeldung.examples.guice.constant.CommunicationModel; + +/** + * + * @author Baekdung + */ +public class EmailCommunicationMode implements CommunicationMode { + + @Override + public CommunicationModel getMode() { + return CommunicationModel.EMAIL; + } + + @Override + @MessageSentLoggable + public boolean sendMessage(String Message) { + throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/IMCommunicationMode.java b/guice-intro/src/main/java/com/baeldung/examples/guice/IMCommunicationMode.java new file mode 100644 index 0000000000..9f34e9a241 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/IMCommunicationMode.java @@ -0,0 +1,30 @@ + +package com.baeldung.examples.guice; + +import com.baeldung.examples.guice.aop.MessageSentLoggable; +import com.baeldung.examples.guice.constant.CommunicationModel; +import com.google.inject.Inject; +import java.util.logging.Logger; + +/** + * + * @author Baeldung + */ +public class IMCommunicationMode implements CommunicationMode { + + @Inject + private Logger logger; + + @Override + public CommunicationModel getMode() { + return CommunicationModel.IM; + } + + @Override + @MessageSentLoggable + public boolean sendMessage(String message) { + logger.info("IM Message Sent"); + return true; + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/SMSCommunicationMode.java b/guice-intro/src/main/java/com/baeldung/examples/guice/SMSCommunicationMode.java new file mode 100644 index 0000000000..251e249971 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/SMSCommunicationMode.java @@ -0,0 +1,29 @@ +package com.baeldung.examples.guice; + +import com.baeldung.examples.guice.aop.MessageSentLoggable; +import com.baeldung.examples.guice.constant.CommunicationModel; +import com.google.inject.Inject; +import java.util.logging.Logger; + +/** + * + * @author Baeldung + */ +public class SMSCommunicationMode implements CommunicationMode { + + @Inject + private Logger logger; + + @Override + public CommunicationModel getMode() { + return CommunicationModel.SMS; + } + + @Override + @MessageSentLoggable + public boolean sendMessage(String message) { + logger.info("SMS message sent"); + return true; + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageLogger.java b/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageLogger.java new file mode 100644 index 0000000000..8926dfa714 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageLogger.java @@ -0,0 +1,22 @@ +package com.baeldung.examples.guice.aop; + +import java.util.logging.Logger; +import org.aopalliance.intercept.MethodInterceptor; +import org.aopalliance.intercept.MethodInvocation; + +/** + * + * @author Baeldung + */ +public class MessageLogger implements MethodInterceptor { + + @Override + public Object invoke(MethodInvocation invocation) throws Throwable { + Object[] objectArray = invocation.getArguments(); + int i = 0; + for (Object object : objectArray) { + Logger.getAnonymousLogger().info("Sending message: " + object.toString()); + } + return invocation.proceed(); + } +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageSentLoggable.java b/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageSentLoggable.java new file mode 100644 index 0000000000..cacf3bde7c --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/aop/MessageSentLoggable.java @@ -0,0 +1,16 @@ +package com.baeldung.examples.guice.aop; + +import java.lang.annotation.ElementType; +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; +import java.lang.annotation.Target; + +/** + * + * @author Baeldung + */ +@Retention(RetentionPolicy.RUNTIME) +@Target(ElementType.METHOD) +public @interface MessageSentLoggable { + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/binding/AOPModule.java b/guice-intro/src/main/java/com/baeldung/examples/guice/binding/AOPModule.java new file mode 100644 index 0000000000..dc9d258efa --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/binding/AOPModule.java @@ -0,0 +1,22 @@ +package com.baeldung.examples.guice.binding; + +import com.baeldung.examples.guice.aop.MessageLogger; +import com.baeldung.examples.guice.aop.MessageSentLoggable; +import com.google.inject.AbstractModule; +import com.google.inject.matcher.Matchers; + +/** + * + * @author Baeldung + */ +public class AOPModule extends AbstractModule { + + @Override + protected void configure() { + bindInterceptor(Matchers.any(), + Matchers.annotatedWith(MessageSentLoggable.class), + new MessageLogger() + ); + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/binding/BasicModule.java b/guice-intro/src/main/java/com/baeldung/examples/guice/binding/BasicModule.java new file mode 100644 index 0000000000..9168195130 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/binding/BasicModule.java @@ -0,0 +1,36 @@ +package com.baeldung.examples.guice.binding; + +import com.baeldung.examples.guice.Communication; +import com.baeldung.examples.guice.CommunicationMode; +import com.baeldung.examples.guice.DefaultCommunicator; +import com.baeldung.examples.guice.EmailCommunicationMode; +import com.baeldung.examples.guice.IMCommunicationMode; +import com.baeldung.examples.guice.SMSCommunicationMode; +import com.google.inject.AbstractModule; +import com.google.inject.name.Names; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * + * @author Baeldung + */ +public class BasicModule extends AbstractModule { + + @Override + protected void configure() { + try { + bind(Communication.class).toConstructor(Communication.class.getConstructor(Boolean.TYPE)); + } catch (NoSuchMethodException ex) { + Logger.getLogger(BasicModule.class.getName()).log(Level.SEVERE, null, ex); + } catch (SecurityException ex) { + Logger.getLogger(BasicModule.class.getName()).log(Level.SEVERE, null, ex); + } + bind(DefaultCommunicator.class).annotatedWith(Names.named("AnotherCommunicator")).to(DefaultCommunicator.class).asEagerSingleton(); + + bind(CommunicationMode.class).annotatedWith(Names.named("IMComms")).to(IMCommunicationMode.class); + bind(CommunicationMode.class).annotatedWith(Names.named("EmailComms")).to(EmailCommunicationMode.class); + bind(CommunicationMode.class).annotatedWith(Names.named("SMSComms")).to(SMSCommunicationMode.class); + } + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/constant/CommunicationModel.java b/guice-intro/src/main/java/com/baeldung/examples/guice/constant/CommunicationModel.java new file mode 100644 index 0000000000..b9fa604a32 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/constant/CommunicationModel.java @@ -0,0 +1,16 @@ +package com.baeldung.examples.guice.constant; + +/** + * + * @author Baeldung + */ +public enum CommunicationModel { + + EMAIL("Email"), SMS("SMS"), IM("IM"), PHONE("Phone"); + + final String name; + + CommunicationModel(String name) { + this.name = name; + } +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/marker/Communicator.java b/guice-intro/src/main/java/com/baeldung/examples/guice/marker/Communicator.java new file mode 100644 index 0000000000..239666b6ab --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/marker/Communicator.java @@ -0,0 +1,11 @@ +package com.baeldung.examples.guice.marker; + +/** + * + * @author Baeldung + */ +public interface Communicator { + + public boolean sendMessage(String message); + +} diff --git a/guice-intro/src/main/java/com/baeldung/examples/guice/modules/BasicModule.java b/guice-intro/src/main/java/com/baeldung/examples/guice/modules/BasicModule.java new file mode 100644 index 0000000000..47b3e2e573 --- /dev/null +++ b/guice-intro/src/main/java/com/baeldung/examples/guice/modules/BasicModule.java @@ -0,0 +1,37 @@ +package com.baeldung.examples.guice.modules; + +import com.baeldung.examples.guice.Communication; +import com.baeldung.examples.guice.CommunicationMode; +import com.baeldung.examples.guice.DefaultCommunicator; +import com.baeldung.examples.guice.EmailCommunicationMode; +import com.baeldung.examples.guice.IMCommunicationMode; +import com.baeldung.examples.guice.SMSCommunicationMode; +import com.google.inject.AbstractModule; +import com.google.inject.name.Names; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * + * @author Baeldung + */ +public class BasicModule extends AbstractModule { + + @Override + protected void configure() { + try { + bind(Communication.class).toConstructor(Communication.class.getConstructor(Boolean.class)); + bind(Boolean.class).toInstance(true); + } catch (NoSuchMethodException ex) { + Logger.getLogger(com.baeldung.examples.guice.binding.BasicModule.class.getName()).log(Level.SEVERE, null, ex); + } catch (SecurityException ex) { + Logger.getLogger(com.baeldung.examples.guice.binding.BasicModule.class.getName()).log(Level.SEVERE, null, ex); + } + bind(DefaultCommunicator.class).annotatedWith(Names.named("AnotherCommunicator")).to(DefaultCommunicator.class).asEagerSingleton(); + + bind(CommunicationMode.class).annotatedWith(Names.named("IMComms")).to(IMCommunicationMode.class); + bind(CommunicationMode.class).annotatedWith(Names.named("EmailComms")).to(EmailCommunicationMode.class); + bind(CommunicationMode.class).annotatedWith(Names.named("SMSComms")).to(SMSCommunicationMode.class); + } + +}