Adjust checkstyle rules. Make checkstyle fail the build when violations are found. Correct all current checkstyle violations.

2015-12-25 23:49:28 +02:00
parent 9fbb085985
commit cec9a99410
167 changed files with 1242 additions and 969 deletions
--- a/caching/src/main/java/com/iluwatar/caching/DbManager.java
+++ b/caching/src/main/java/com/iluwatar/caching/DbManager.java
@ -0,0 +1,140 @@
+package com.iluwatar.caching;
+
+import java.text.ParseException;
+import java.util.HashMap;
+
+import org.bson.Document;
+
+import com.mongodb.MongoClient;
+import com.mongodb.client.FindIterable;
+import com.mongodb.client.MongoDatabase;
+import com.mongodb.client.model.UpdateOptions;
+
+/**
+ *
+ * <p>DBManager handles the communication with the underlying data store i.e. Database. It contains the
+ * implemented methods for querying, inserting, and updating data. MongoDB was used as the database
+ * for the application.</p>
+ * 
+ * <p>Developer/Tester is able to choose whether the application should use MongoDB as its underlying
+ * data storage (connect()) or a simple Java data structure to (temporarily) store the data/objects
+ * during runtime (createVirtualDB()).</p>
+ * 
+ */
+public class DbManager {
+
+  private static MongoClient mongoClient;
+  private static MongoDatabase db;
+  private static boolean useMongoDB;
+
+  private static HashMap<String, UserAccount> virtualDB;
+
+  /**
+   * Create DB
+   */
+  public static void createVirtualDb() {
+    useMongoDB = false;
+    virtualDB = new HashMap<String, UserAccount>();
+  }
+
+  /**
+   * Connect to DB
+   */
+  public static void connect() throws ParseException {
+    useMongoDB = true;
+    mongoClient = new MongoClient();
+    db = mongoClient.getDatabase("test");
+  }
+
+  /**
+   * Read user account from DB
+   */
+  public static UserAccount readFromDb(String userId) {
+    if (!useMongoDB) {
+      if (virtualDB.containsKey(userId)) {
+        return virtualDB.get(userId);
+      }
+      return null;
+    }
+    if (null == db) {
+      try {
+        connect();
+      } catch (ParseException e) {
+        e.printStackTrace();
+      }
+    }
+    FindIterable<Document> iterable =
+        db.getCollection("user_accounts").find(new Document("userID", userId));
+    if (iterable == null) {
+      return null;
+    }
+    Document doc = iterable.first();
+    UserAccount userAccount =
+        new UserAccount(userId, doc.getString("userName"), doc.getString("additionalInfo"));
+    return userAccount;
+  }
+
+  /**
+   * Write user account to DB
+   */
+  public static void writeToDb(UserAccount userAccount) {
+    if (!useMongoDB) {
+      virtualDB.put(userAccount.getUserId(), userAccount);
+      return;
+    }
+    if (null == db) {
+      try {
+        connect();
+      } catch (ParseException e) {
+        e.printStackTrace();
+      }
+    }
+    db.getCollection("user_accounts").insertOne(
+        new Document("userID", userAccount.getUserId()).append("userName",
+            userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo()));
+  }
+
+  /**
+   * Update DB
+   */
+  public static void updateDb(UserAccount userAccount) {
+    if (!useMongoDB) {
+      virtualDB.put(userAccount.getUserId(), userAccount);
+      return;
+    }
+    if (null == db) {
+      try {
+        connect();
+      } catch (ParseException e) {
+        e.printStackTrace();
+      }
+    }
+    db.getCollection("user_accounts").updateOne(
+        new Document("userID", userAccount.getUserId()),
+        new Document("$set", new Document("userName", userAccount.getUserName()).append(
+            "additionalInfo", userAccount.getAdditionalInfo())));
+  }
+
+  /**
+   *
+   * Insert data into DB if it does not exist. Else, update it.
+   */
+  public static void upsertDb(UserAccount userAccount) {
+    if (!useMongoDB) {
+      virtualDB.put(userAccount.getUserId(), userAccount);
+      return;
+    }
+    if (null == db) {
+      try {
+        connect();
+      } catch (ParseException e) {
+        e.printStackTrace();
+      }
+    }
+    db.getCollection("user_accounts").updateOne(
+        new Document("userID", userAccount.getUserId()),
+        new Document("$set", new Document("userID", userAccount.getUserId()).append("userName",
+            userAccount.getUserName()).append("additionalInfo", userAccount.getAdditionalInfo())),
+        new UpdateOptions().upsert(true));
+  }
+}