Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

spring-apache-camel/src/main/java/com/baeldung/camel/file/ContentBasedFileRouter.java

@@ -0,0 +1,16 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.builder.RouteBuilder;
+
+public class ContentBasedFileRouter extends RouteBuilder {
+
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+    private static final String DESTINATION_FOLDER_TXT = "src/test/destination-folder-txt";
+    private static final String DESTINATION_FOLDER_OTHER = "src/test/destination-folder-other";
+
+    @Override
+    public void configure() throws Exception {
+        from("file://" + SOURCE_FOLDER + "?delete=true").choice().when(simple("${file:ext} == 'txt'")).to("file://" + DESTINATION_FOLDER_TXT).otherwise().to("file://" + DESTINATION_FOLDER_OTHER);
+    }
+
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/DeadLetterChannelFileRouter.java

@@ -0,0 +1,18 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.LoggingLevel;
+import org.apache.camel.builder.RouteBuilder;
+
+public class DeadLetterChannelFileRouter extends RouteBuilder {
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+
+    @Override
+    public void configure() throws Exception {
+        errorHandler(deadLetterChannel("log:dead?level=ERROR").maximumRedeliveries(3)
+                .redeliveryDelay(1000).retryAttemptedLogLevel(LoggingLevel.ERROR));
+
+        from("file://" + SOURCE_FOLDER + "?delete=true").process((exchange) -> {
+            throw new IllegalArgumentException("Exception thrown!");
+        });
+    }
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/FileProcessor.java

@@ -0,0 +1,20 @@
+package com.baeldung.camel.file;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.Processor;
+
+public class FileProcessor implements Processor {
+
+    public void process(Exchange exchange) throws Exception {
+        String originalFileName = (String) exchange.getIn().getHeader(Exchange.FILE_NAME, String.class);
+
+        Date date = new Date();
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
+        String changedFileName = dateFormat.format(date) + originalFileName;
+        exchange.getIn().setHeader(Exchange.FILE_NAME, changedFileName);
+    }
+
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/FileRouter.java

@@ -0,0 +1,15 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.builder.RouteBuilder;
+
+public class FileRouter extends RouteBuilder {
+
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+    private static final String DESTINATION_FOLDER = "src/test/destination-folder";
+
+    @Override
+    public void configure() throws Exception {
+        from("file://" + SOURCE_FOLDER + "?delete=true").process(new FileProcessor()).to("file://" + DESTINATION_FOLDER);
+    }
+
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/MessageTranslatorFileRouter.java

@@ -0,0 +1,14 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.builder.RouteBuilder;
+
+public class MessageTranslatorFileRouter extends RouteBuilder {
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+    private static final String DESTINATION_FOLDER = "src/test/destination-folder";
+
+    @Override
+    public void configure() throws Exception {
+        from("file://" + SOURCE_FOLDER + "?delete=true").transform(body().append(header(Exchange.FILE_NAME))).to("file://" + DESTINATION_FOLDER);
+    }
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/MulticastFileRouter.java

@@ -0,0 +1,18 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.builder.RouteBuilder;
+
+public class MulticastFileRouter extends RouteBuilder {
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+    private static final String DESTINATION_FOLDER_WORLD = "src/test/destination-folder-world";
+    private static final String DESTINATION_FOLDER_HELLO = "src/test/destination-folder-hello";
+
+    @Override
+    public void configure() throws Exception {
+        from("file://" + SOURCE_FOLDER + "?delete=true").multicast().to("direct:append", "direct:prepend").end();
+
+        from("direct:append").transform(body().append("World")).to("file://" + DESTINATION_FOLDER_WORLD);
+
+        from("direct:prepend").transform(body().prepend("Hello")).to("file://" + DESTINATION_FOLDER_HELLO);
+    }
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/SplitterFileRouter.java

@@ -0,0 +1,15 @@
+package com.baeldung.camel.file;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.builder.RouteBuilder;
+
+public class SplitterFileRouter extends RouteBuilder {
+    private static final String SOURCE_FOLDER = "src/test/source-folder";
+    private static final String DESTINATION_FOLDER = "src/test/destination-folder";
+
+    @Override
+    public void configure() throws Exception {
+
+        from("file://" + SOURCE_FOLDER + "?delete=true").split(body().convertToString().tokenize("\n")).setHeader(Exchange.FILE_NAME, body()).to("file://" + DESTINATION_FOLDER);
+    }
+}

spring-apache-camel/src/main/java/com/baeldung/camel/file/cfg/ContentBasedFileRouterConfig.java

@@ -0,0 +1,26 @@
+package com.baeldung.camel.file.cfg;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.camel.builder.RouteBuilder;
+import org.apache.camel.spring.javaconfig.CamelConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.baeldung.camel.file.ContentBasedFileRouter;
+
+@Configuration
+public class ContentBasedFileRouterConfig extends CamelConfiguration {
+
+	@Bean
+	ContentBasedFileRouter getContentBasedFileRouter() {
+		return new ContentBasedFileRouter();
+	}
+
+	@Override
+	public List<RouteBuilder> routes() {
+		return Arrays.asList(getContentBasedFileRouter());
+	}
+
+}

spring-apache-camel/src/main/java/com/baeldung/camel/main/App.java

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+package com.baeldung.camel.main;
+
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+public class App {
+    public static void main(final String[] args) throws Exception {
+        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("camel-context.xml");
+        // Keep main thread alive for some time to let application finish processing the input files.
+        Thread.sleep(5000);
+        applicationContext.close();
+    }
+}

spring-apache-camel/src/main/java/com/baeldung/camel/processor/FileProcessor.java

@@ -0,0 +1,14 @@
+package com.baeldung.camel.processor;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.Processor;
+
+public class FileProcessor implements Processor {
+
+    public void process(Exchange exchange) throws Exception {
+        String originalFileContent = exchange.getIn().getBody(String.class);
+        String upperCaseFileContent = originalFileContent.toUpperCase();
+        exchange.getIn().setBody(upperCaseFileContent);
+    }
+
+}