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

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

spark-java/src/main/java/com/baeldung/sparkjava/HelloWorldService.java

@@ -0,0 +1,13 @@
+package com.baeldung.sparkjava;
+
+import static spark.Spark.*;
+
+public class HelloWorldService {
+    public static void main(String[] args) {
+        get("/hello", (req, res) -> "Hello, Baeldung");
+
+        get("/hello/:name", (req, res) -> {
+            return "Hello: " + req.params(":name");
+        });
+    }
+}

spark-java/src/main/java/com/baeldung/sparkjava/SparkRestExample.java

@@ -0,0 +1,64 @@
+package com.baeldung.sparkjava;
+
+import static spark.Spark.delete;
+import static spark.Spark.get;
+import static spark.Spark.options;
+import static spark.Spark.post;
+import static spark.Spark.put;
+
+import com.google.gson.Gson;
+
+public class SparkRestExample {
+    public static void main(String[] args) {
+        final UserService userService = new UserServiceMapImpl();
+
+        post("/users", (request, response) -> {
+            response.type("application/json");
+
+            User user = new Gson().fromJson(request.body(), User.class);
+            userService.addUser(user);
+
+            return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS));
+        });
+
+        get("/users", (request, response) -> {
+            response.type("application/json");
+
+            return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS, new Gson().toJsonTree(userService.getUsers())));
+        });
+
+        get("/users/:id", (request, response) -> {
+            response.type("application/json");
+
+            return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS, new Gson().toJsonTree(userService.getUser(request.params(":id")))));
+        });
+
+        put("/users/:id", (request, response) -> {
+            response.type("application/json");
+
+            User toEdit = new Gson().fromJson(request.body(), User.class);
+            User editedUser = userService.editUser(toEdit);
+
+            if (editedUser != null) {
+                return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS, new Gson().toJsonTree(editedUser)));
+            } else {
+                return new Gson().toJson(new StandardResponse(StatusResponse.ERROR, new Gson().toJson("User not found or error in edit")));
+            }
+        });
+
+        delete("/users/:id", (request, response) -> {
+            response.type("application/json");
+
+            userService.deleteUser(request.params(":id"));
+            return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS, "user deleted"));
+        });
+
+        options("/users/:id", (request, response) -> {
+            response.type("application/json");
+
+            return new Gson().toJson(new StandardResponse(StatusResponse.SUCCESS, (userService.userExist(request.params(":id"))) ? "User exists" : "User does not exists"));
+        });
+
+    }
+
+}

spark-java/src/main/java/com/baeldung/sparkjava/StandardResponse.java

@@ -0,0 +1,47 @@
+package com.baeldung.sparkjava;
+
+import com.google.gson.JsonElement;
+
+public class StandardResponse {
+    private StatusResponse status;
+    private String message;
+    private JsonElement data;
+
+    public StandardResponse(StatusResponse status) {
+        this.status = status;
+    }
+
+    public StandardResponse(StatusResponse status, String message) {
+        this.status = status;
+        this.message = message;
+    }
+
+    public StandardResponse(StatusResponse status, JsonElement data) {
+        this.status = status;
+        this.data = data;
+    }
+
+    public StatusResponse getStatus() {
+        return status;
+    }
+
+    public void setStatus(StatusResponse status) {
+        this.status = status;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public JsonElement getData() {
+        return data;
+    }
+
+    public void setData(JsonElement data) {
+        this.data = data;
+    }
+}

spark-java/src/main/java/com/baeldung/sparkjava/StatusResponse.java

@@ -0,0 +1,16 @@
+package com.baeldung.sparkjava;
+
+public enum StatusResponse {
+    SUCCESS("Success"), ERROR("Error");
+
+    final private String status;
+
+    StatusResponse(String status) {
+        this.status = status;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+}

spark-java/src/main/java/com/baeldung/sparkjava/User.java

@@ -0,0 +1,59 @@
+/*
+ * 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.sparkjava;
+
+class User {
+
+    private String id;
+    private String firstName;
+    private String lastName;
+    private String email;
+
+    public User(String id, String firstName, String lastName, String email) {
+        super();
+        this.id = id;
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.email = email;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    @Override
+    public String toString() {
+        return new StringBuffer().append(getEmail()).toString();
+    }
+}

spark-java/src/main/java/com/baeldung/sparkjava/UserException.java

@@ -0,0 +1,13 @@
+package com.baeldung.sparkjava;
+
+public class UserException extends Exception {
+
+    public UserException() {
+        super();
+    }
+
+    public UserException(String message) {
+        super(message);
+    }
+
+}

spark-java/src/main/java/com/baeldung/sparkjava/UserService.java

@@ -0,0 +1,17 @@
+package com.baeldung.sparkjava;
+
+import java.util.Collection;
+
+public interface UserService {
+    public void addUser(User user);
+
+    public Collection<User> getUsers();
+
+    public User getUser(String id);
+
+    public User editUser(User user) throws UserException;
+
+    public void deleteUser(String id);
+
+    public boolean userExist(String id);
+}

spark-java/src/main/java/com/baeldung/sparkjava/UserServiceMapImpl.java

@@ -0,0 +1,68 @@
+package com.baeldung.sparkjava;
+
+import java.util.Collection;
+import java.util.HashMap;
+
+public class UserServiceMapImpl implements UserService {
+    private HashMap<String, User> userMap;
+
+    public UserServiceMapImpl() {
+        userMap = new HashMap<>();
+    }
+
+    @Override
+    public void addUser(User user) {
+        userMap.put(user.getId(), user);
+    }
+
+    @Override
+    public Collection<User> getUsers() {
+        return userMap.values();
+    }
+
+    @Override
+    public User getUser(String id) {
+        return userMap.get(id);
+    }
+
+    @Override
+    public User editUser(User forEdit) throws UserException {
+        try {
+            if (forEdit.getId() == null)
+                throw new UserException("ID cannot be blank");
+
+            User toEdit = userMap.get(forEdit.getId());
+
+            if (toEdit == null)
+                throw new UserException("User not found");
+
+            if (forEdit.getEmail() != null) {
+                toEdit.setEmail(forEdit.getEmail());
+            }
+            if (forEdit.getFirstName() != null) {
+                toEdit.setFirstName(forEdit.getFirstName());
+            }
+            if (forEdit.getLastName() != null) {
+                toEdit.setLastName(forEdit.getLastName());
+            }
+            if (forEdit.getId() != null) {
+                toEdit.setId(forEdit.getId());
+            }
+
+            return toEdit;
+        } catch (Exception ex) {
+            throw new UserException(ex.getMessage());
+        }
+    }
+
+    @Override
+    public void deleteUser(String id) {
+        userMap.remove(id);
+    }
+
+    @Override
+    public boolean userExist(String id) {
+        return userMap.containsKey(id);
+    }
+
+}