JAVA-1470 Move 10 articles to libraries-4 module

libraries-4/src/main/java/com/baeldung/distinct/DistinctWithJavaFunction.java

@@ -0,0 +1,15 @@
+package com.baeldung.distinct;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+public class DistinctWithJavaFunction {
+
+    public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor) {
+        Map<Object, Boolean> seen = new ConcurrentHashMap<>();
+        return t -> seen.putIfAbsent(keyExtractor.apply(t), Boolean.TRUE) == null;
+    }
+
+}

libraries-4/src/main/java/com/baeldung/distinct/Person.java

@@ -0,0 +1,65 @@
+package com.baeldung.distinct;
+
+public class Person {
+    int age;
+    String name;
+    String email;
+
+    public Person(int age, String name, String email) {
+        super();
+        this.age = age;
+        this.name = name;
+        this.email = email;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+        builder.append("Person [age=");
+        builder.append(age);
+        builder.append(", name=");
+        builder.append(name);
+        builder.append(", email=");
+        builder.append(email);
+        builder.append("]");
+        return builder.toString();
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((email == null) ? 0 : email.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Person other = (Person) obj;
+        if (email == null) {
+            if (other.email != null)
+                return false;
+        } else if (!email.equals(other.email))
+            return false;
+        return true;
+    }
+
+}

libraries-4/src/main/java/com/baeldung/eclipsecollections/ConvertContainerToAnother.java

@@ -0,0 +1,19 @@
+package com.baeldung.eclipsecollections;
+
+import java.util.List;
+
+import org.eclipse.collections.impl.set.mutable.UnifiedSet;
+
+public class ConvertContainerToAnother {
+
+    @SuppressWarnings("rawtypes")
+    public static List convertToList() {
+        UnifiedSet<String> cars = new UnifiedSet<>();
+
+        cars.add("Toyota");
+        cars.add("Mercedes");
+        cars.add("Volkswagen");
+
+        return cars.toList();
+    }
+}

libraries-4/src/main/java/com/baeldung/eclipsecollections/Student.java

@@ -0,0 +1,46 @@
+package com.baeldung.eclipsecollections;
+
+import java.util.List;
+
+public class Student {
+
+    private String firstName;
+    private String lastName;
+    private List<String> addresses;
+
+    public Student(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public Student(String firstName, String lastName, List<String> addresses) {
+        super();
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.addresses = addresses;
+    }
+
+    public String getFirstName() {
+        return this.firstName;
+    }
+
+    public String getLastName() {
+        return this.lastName;
+    }
+
+    public List<String> getAddresses() {
+        return addresses;
+    }
+
+    public void setAddresses(List<String> addresses) {
+        this.addresses = addresses;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+}

libraries-4/src/main/java/com/baeldung/jdeffered/FilterDemo.java

@@ -0,0 +1,24 @@
+package com.baeldung.jdeffered;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DeferredObject;
+
+class FilterDemo {
+
+    private static String modifiedMsg;
+
+    static String filter(String msg) {
+
+        Deferred<String, ?, ?> d = new DeferredObject<>();
+        Promise<String, ?, ?> p = d.promise();
+        Promise<String, ?, ?> filtered = p.then((result) -> {
+            modifiedMsg = "Hello " + result;
+        });
+
+        filtered.done(r -> System.out.println("filtering done"));
+
+        d.resolve(msg);
+        return modifiedMsg;
+    }
+}

libraries-4/src/main/java/com/baeldung/jdeffered/PipeDemo.java

@@ -0,0 +1,32 @@
+package com.baeldung.jdeffered;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.DonePipe;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DeferredObject;
+
+class PipeDemo {
+
+    public enum Result {
+        SUCCESS, FAILURE
+    };
+
+    private static Result status;
+
+    static Result validate(int num) {
+        Deferred<Integer, ?, ?> d = new DeferredObject<>();
+        Promise<Integer, ?, ?> p = d.promise();
+
+        p.then((DonePipe<Integer, Integer, Exception, Void>) result -> {
+            if (result < 90) {
+                return new DeferredObject<Integer, Exception, Void>().resolve(result);
+            } else {
+                return new DeferredObject<Integer, Exception, Void>().reject(new Exception("Unacceptable value"));
+            }
+        }).done(r -> status = Result.SUCCESS).fail(r -> status = Result.FAILURE);
+
+        d.resolve(num);
+
+        return status;
+    }
+}

libraries-4/src/main/java/com/baeldung/jdeffered/PromiseDemo.java

@@ -0,0 +1,21 @@
+package com.baeldung.jdeffered;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DeferredObject;
+
+class PromiseDemo {
+
+    static void startJob(String jobName) {
+
+        Deferred<String, String, String> deferred = new DeferredObject<>();
+        Promise<String, String, String> promise = deferred.promise();
+
+        promise.done(result -> System.out.println("Job done")).fail(rejection -> System.out.println("Job fail")).progress(progress -> System.out.println("Job is in progress")).always((state, result, rejection) -> System.out.println("Job execution started"));
+
+        deferred.resolve(jobName);
+        // deferred.notify("");
+        // deferred.reject("oops");
+    }
+
+}

libraries-4/src/main/java/com/baeldung/jdeffered/ThreadSafeDemo.java

@@ -0,0 +1,36 @@
+package com.baeldung.jdeffered;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.DeferredManager;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DefaultDeferredManager;
+import org.jdeferred.impl.DeferredObject;
+
+public class ThreadSafeDemo {
+
+    public static void task() {
+        DeferredManager dm = new DefaultDeferredManager();
+        Deferred<String, String, String> deferred = new DeferredObject<>();
+        Promise<String, String, String> p1 = deferred.promise();
+        Promise<String, String, String> p = dm.when(p1).done(r -> System.out.println("done")).fail(r -> System.out.println("fail"));
+
+        synchronized (p) {
+            while (p.isPending()) {
+                try {
+                    p.wait();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+
+        try {
+            p.waitSafely();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+        deferred.resolve("Hello Baeldung");
+    }
+
+}

libraries-4/src/main/java/com/baeldung/jdeffered/manager/DeferredManagerDemo.java

@@ -0,0 +1,22 @@
+package com.baeldung.jdeffered.manager;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.DeferredManager;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DefaultDeferredManager;
+import org.jdeferred.impl.DeferredObject;
+
+class DeferredManagerDemo {
+
+    public static void initiate() {
+        Deferred<String, String, String> deferred = new DeferredObject<>();
+        DeferredManager dm = new DefaultDeferredManager();
+        Promise<String, String, String> p1 = deferred.promise(), p2 = deferred.promise(), p3 = deferred.promise();
+        dm.when(p1, p2, p3).done((result) -> {
+            System.out.println("done");
+        }).fail((result) -> {
+            System.out.println("fail");
+        });
+        deferred.resolve("Hello Baeldung");
+    }
+}

libraries-4/src/main/java/com/baeldung/jdeffered/manager/DeferredManagerWithExecutorDemo.java

@@ -0,0 +1,22 @@
+package com.baeldung.jdeffered.manager;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.jdeferred.Deferred;
+import org.jdeferred.DeferredManager;
+import org.jdeferred.Promise;
+import org.jdeferred.impl.DefaultDeferredManager;
+import org.jdeferred.impl.DeferredObject;
+
+class DeferredManagerWithExecutorDemo {
+
+    public static void initiate() {
+        ExecutorService executor = Executors.newFixedThreadPool(10);
+        Deferred<String, String, String> deferred = new DeferredObject<>();
+        DeferredManager dm = new DefaultDeferredManager(executor);
+        Promise<String, String, String> p1 = deferred.promise(), p2 = deferred.promise(), p3 = deferred.promise();
+        dm.when(p1, p2, p3).done(r -> System.out.println("done")).fail(r -> System.out.println("fail"));
+        deferred.resolve("done");
+    }
+}

libraries-4/src/main/java/com/baeldung/jdeffered/manager/SimpleDeferredManagerDemo.java

@@ -0,0 +1,12 @@
+package com.baeldung.jdeffered.manager;
+
+import org.jdeferred.DeferredManager;
+import org.jdeferred.impl.DefaultDeferredManager;
+
+class SimpleDeferredManagerDemo {
+
+    public static void initiate() {
+        DeferredManager dm = new DefaultDeferredManager();
+        dm.when(() -> 1).done(r -> System.out.println("done")).fail(Throwable::printStackTrace);
+    }
+}

libraries-4/src/main/java/com/baeldung/mbassador/AckMessage.java

@@ -0,0 +1,5 @@
+package com.baeldung.mbassador;
+
+public class AckMessage extends Message {
+
+}

libraries-4/src/main/java/com/baeldung/mbassador/Message.java

@@ -0,0 +1,5 @@
+package com.baeldung.mbassador;
+
+public class Message {
+
+}

libraries-4/src/main/java/com/baeldung/mbassador/RejectMessage.java

@@ -0,0 +1,15 @@
+package com.baeldung.mbassador;
+
+public class RejectMessage extends Message {
+
+    int code;
+
+    public int getCode() {
+        return code;
+    }
+
+    public void setCode(int code) {
+        this.code = code;
+    }
+
+}

libraries-4/src/main/java/com/baeldung/noexception/CustomExceptionHandler.java

@@ -0,0 +1,21 @@
+package com.baeldung.noexception;
+
+import com.machinezoo.noexception.ExceptionHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CustomExceptionHandler extends ExceptionHandler {
+
+    private Logger logger = LoggerFactory.getLogger(CustomExceptionHandler.class);
+
+    @Override
+    public boolean handle(Throwable throwable) {
+
+        if (throwable.getClass().isAssignableFrom(RuntimeException.class) || throwable.getClass().isAssignableFrom(Error.class)) {
+            return false;
+        } else {
+            logger.error("Caught Exception ", throwable);
+            return true;
+        }
+    }
+}

libraries-4/src/main/java/com/baeldung/pairs/CustomPair.java

@@ -0,0 +1,33 @@
+package com.baeldung.pairs;
+
+public class CustomPair {
+
+    private String key;
+    private String value;
+    
+    public CustomPair(String key, String value) {
+        super();
+        this.key = key;
+        this.value = value;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+    
+    public Object[] getPair() {
+        return new Object[] { this.key, this.value};
+    }
+}

libraries-4/src/main/java/com/baeldung/rome/RSSRomeExample.java

@@ -0,0 +1,76 @@
+package com.baeldung.rome;
+
+import com.sun.syndication.feed.synd.*;
+import com.sun.syndication.io.FeedException;
+import com.sun.syndication.io.SyndFeedInput;
+import com.sun.syndication.io.SyndFeedOutput;
+import com.sun.syndication.io.XmlReader;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.Writer;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class RSSRomeExample {
+
+    public static void main(String[] args) throws IOException, FeedException {
+        SyndFeed feed = createFeed();
+        addEntryToFeed(feed);
+        publishFeed(feed);
+        readFeed();
+    }
+
+    private static SyndFeed createFeed() {
+        SyndFeed feed = new SyndFeedImpl();
+        feed.setFeedType("rss_1.0");
+        feed.setTitle("Test title");
+        feed.setLink("http://www.somelink.com");
+        feed.setDescription("Basic description");
+
+        return feed;
+    }
+
+    private static void addEntryToFeed(SyndFeed feed) {
+        SyndEntry entry = new SyndEntryImpl();
+        entry.setTitle("Entry title");
+        entry.setLink("http://www.somelink.com/entry1");
+
+        addDescriptionToEntry(entry);
+        addCategoryToEntry(entry);
+
+        feed.setEntries(Arrays.asList(entry));
+    }
+
+    private static void addDescriptionToEntry(SyndEntry entry) {
+        SyndContent description = new SyndContentImpl();
+        description.setType("text/html");
+        description.setValue("First entry");
+
+        entry.setDescription(description);
+    }
+
+    private static void addCategoryToEntry(SyndEntry entry) {
+        List<SyndCategory> categories = new ArrayList<>();
+        SyndCategory category = new SyndCategoryImpl();
+        category.setName("Sophisticated category");
+        categories.add(category);
+
+        entry.setCategories(categories);
+    }
+
+    private static void publishFeed(SyndFeed feed) throws IOException, FeedException {
+        Writer writer = new FileWriter("xyz.txt");
+        SyndFeedOutput syndFeedOutput = new SyndFeedOutput();
+        syndFeedOutput.output(feed, writer);
+        writer.close();
+    }
+
+    private static SyndFeed readFeed() throws IOException, FeedException {
+        URL feedSource = new URL("http://rssblog.whatisrss.com/feed/");
+        SyndFeedInput input = new SyndFeedInput();
+        return input.build(new XmlReader(feedSource));
+    }
+}

libraries-4/src/main/java/com/baeldung/yarg/DocumentController.java

@@ -0,0 +1,48 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.baeldung.yarg;
+
+import com.haulmont.yarg.formatters.factory.DefaultFormatterFactory;
+import com.haulmont.yarg.loaders.factory.DefaultLoaderFactory;
+import com.haulmont.yarg.loaders.impl.JsonDataLoader;
+import com.haulmont.yarg.reporting.Reporting;
+import com.haulmont.yarg.reporting.RunParams;
+import com.haulmont.yarg.structure.Report;
+import com.haulmont.yarg.structure.ReportBand;
+import com.haulmont.yarg.structure.ReportOutputType;
+import com.haulmont.yarg.structure.impl.BandBuilder;
+import com.haulmont.yarg.structure.impl.ReportBuilder;
+import com.haulmont.yarg.structure.impl.ReportTemplateBuilder;
+import java.io.File;
+import java.io.IOException;
+import javax.servlet.http.HttpServletResponse;
+import org.apache.commons.io.FileUtils;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class DocumentController {
+
+    @RequestMapping(path = "/generate/doc", method = RequestMethod.GET)
+    public void generateDocument(HttpServletResponse response) throws IOException {
+        ReportBuilder reportBuilder = new ReportBuilder();
+        ReportTemplateBuilder reportTemplateBuilder = new ReportTemplateBuilder().documentPath("./src/main/resources/Letter.docx").documentName("Letter.docx").outputType(ReportOutputType.docx).readFileFromPath();
+        reportBuilder.template(reportTemplateBuilder.build());
+        BandBuilder bandBuilder = new BandBuilder();
+        String json = FileUtils.readFileToString(new File("./src/main/resources/Data.json"));
+        ReportBand main = bandBuilder.name("Main").query("Main", "parameter=param1 $.main", "json").build();
+        reportBuilder.band(main);
+        Report report = reportBuilder.build();
+
+        Reporting reporting = new Reporting();
+        reporting.setFormatterFactory(new DefaultFormatterFactory());
+        reporting.setLoaderFactory(new DefaultLoaderFactory().setJsonDataLoader(new JsonDataLoader()));
+        response.setContentType("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
+        reporting.runReport(new RunParams(report).param("param1", json), response.getOutputStream());
+    }
+
+}