AT&T coding test for gayathri_penubothu

configurationapp/src/main/java/com/att/ConfigurationApp.java

@@ -3,10 +3,16 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+/**
+ * The main class of ConfigurationApp
+ * 
+ * @author gayathri
+ *
+ */
 @SpringBootApplication
 public class ConfigurationApp {
 
-    public static void main(String[] args) {
-        SpringApplication.run(ConfigurationApp.class, args);
-    }
+	public static void main(String[] args) {
+		SpringApplication.run(ConfigurationApp.class, args);
+	}
 }

configurationapp/src/main/java/com/att/dao/configurations/ConfigurationDao.java

@@ -1,48 +1,195 @@
 package com.att.dao.configurations;
 
-import com.att.data.configurations.ConfigValue;
-import org.springframework.stereotype.Service;
-
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+import com.att.data.configurations.ConfigValue;
 
+/**
+ * The ConfigurationDao class is used to manage the month year wise
+ * configurations.
+ * 
+ * @author gayathri
+ *
+ */
 @Service
 public class ConfigurationDao {
-    private class IdProvider {
-        private int currentId;
 
-        public IdProvider() {
-            currentId = 0;
-        }
+	/**
+	 * Simple Class to provide sequence id to configurations.
+	 * 
+	 * @author gayathri
+	 *
+	 */
+	private class IdProvider {
+		private int currentId;
+
+		/**
+		 * Constructor initialization with sequence to zero.
+		 */
+		public IdProvider() {
+			currentId = 0;
+		}
 
-        public int getNextId() {
-            return this.currentId++;
-        }
-    }
+		/**
+		 * To get next sequence id for the configuration.
+		 * 
+		 * @return next sequence id
+		 */
+		public int getNextId() {
+			return this.currentId++;
+		}
+	}
 
-    /**
-     * No DB, so store the configs in a map.
-     */
-    private Map<String, List<ConfigValue>> currentConfigurations;
-    private IdProvider idProvider;
+	/**
+	 * No DB, so store the configs in a map.
+	 */
+	private Map<String, List<ConfigValue>> currentConfigurations;
+	private IdProvider idProvider;
+	private static final Logger LOGGER = LoggerFactory.getLogger(ConfigurationDao.class);
 
-    public ConfigurationDao() {
-        idProvider = new IdProvider();
-        currentConfigurations = new HashMap<>();
-    }
+	/**
+	 * Initializing default constructor.
+	 */
+	public ConfigurationDao() {
+		idProvider = new IdProvider();
+		currentConfigurations = new HashMap<>();
+	}
 
-    public List<ConfigValue> getConfigurationsForYearMonth(String yearMonth) {
-        return new ArrayList<>();
-    }
+	/**
+	 * To get the configurations of the given month.
+	 * 
+	 * @param yearMonth year month like 0520119 for May 2019.
+	 * @return List<ConfigValue>
+	 */
+	public List<ConfigValue> getConfigurationsForYearMonth(String yearMonth) {
+		try {
+			LOGGER.debug("START : getConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+			if (currentConfigurations != null && yearMonth != null && yearMonth.trim().length() > 0) {
+				List<ConfigValue> configurations = currentConfigurations.get(yearMonth);
+				if (configurations == null) {
+					configurations = new ArrayList<ConfigValue>();
+				}
+				LOGGER.debug("STOP : getConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+				return configurations;
+			}
+		} catch (Exception e) {
+			LOGGER.error("EXCEPTION : getConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+		}
+		return new ArrayList<ConfigValue>();
+	}
 
-    public void addConfiguration(String yearMonth, ConfigValue value) {
-        int newId = idProvider.getNextId();
+	/**
+	 * To add the new configuration for the given month year.
+	 * 
+	 * @param yearMonth year month like 0520119 for May 2019.
+	 * @param value     Config Value to be added.
+	 * @return result
+	 */
+	public String addConfiguration(String yearMonth, ConfigValue value) {
+		String result = "Oops! Something went wrong while adding new configuration.";
+		try {
+			LOGGER.debug("START : addConfiguration(String, ConfigValue) of " + this.getClass().getSimpleName());
+			if (currentConfigurations != null && yearMonth != null && yearMonth.trim().length() > 0 && value != null) {
+				int newId = idProvider.getNextId();
+				value.setConfigId(newId);
 
-    }
+				List<ConfigValue> configurations = currentConfigurations.get(yearMonth);
+				if (configurations == null) {
+					configurations = new ArrayList<ConfigValue>();
+					configurations.add(value);
+					currentConfigurations.put(yearMonth, configurations);
+					result = "Given configuration has been successfully added for the selected month.";
+				} else {
+					Optional<ConfigValue> configValueOpt = configurations.stream().filter(configValueData -> {
+						return configValueData.getConfigName().equals(value.getConfigName());
+					}).findFirst();
+					if (configValueOpt.isPresent()) {
+						result = "Configuration with given name already exists for the selected month.";
+					} else {
+						configurations.add(value);
+						currentConfigurations.put(yearMonth, configurations);
+						result = "Given configuration has been successfully added for the selected month.";
+					}
+				}
+			}
+			LOGGER.debug("STOP : addConfiguration(String, ConfigValue) of " + this.getClass().getSimpleName());
+		} catch (Exception e) {
+			LOGGER.error("EXCEPTION : addConfiguration(String, ConfigValue) of " + this.getClass().getSimpleName());
+		}
+		return result;
+	}
 
-    public void removeAllConfigurationsForYearMonth(String yearMonth) {
+	/**
+	 * To remove all the configuration for the given month year.
+	 * 
+	 * @param yearMonth year month like 0520119 for May 2019.
+	 * @return result
+	 */
+	public String removeAllConfigurationsForYearMonth(String yearMonth) {
+		String result = "Oops! Something went wrong while deleting the configurations for the selected month.";
+		try {
+			LOGGER.debug("START : removeAllConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+			if (currentConfigurations != null && yearMonth != null && yearMonth.trim().length() > 0) {
+				List<ConfigValue> configValues = currentConfigurations.remove(yearMonth);
+				if (configValues != null && configValues.size() > 0) {
+					result = "All the configurtions for the selected month got deleted successfully.";
+				} else {
+					result = "Selected month don't have any configurtions asscoiated with it.";
+				}
+			}
+			LOGGER.debug("STOP : removeAllConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+		} catch (Exception e) {
+			LOGGER.error(
+					"EXCEPTION : removeAllConfigurationsForYearMonth(String) of " + this.getClass().getSimpleName());
+		}
+		return result;
+	}
 
-    }
+	/**
+	 * To remove given configuration for the given month year based on config id.
+	 * 
+	 * @param yearMonth year month like 0520119 for May 2019.
+	 * @param value     Config Value to be added.
+	 */
+	public String removeOneConfigForYearMonth(String yearMonth, Integer configId) {
+		boolean result = false;
+		String response = "Oops! Something went wrong while deleting the selected configuration for the selected month.";
+		try {
+			LOGGER.debug(
+					"START : removeOneConfigForYearMonth(String, ConfigValue) of " + this.getClass().getSimpleName());
+			if (currentConfigurations != null && yearMonth != null && yearMonth.trim().length() > 0 && configId != null
+					&& configId >= 0) {
+				List<ConfigValue> configurations = currentConfigurations.get(yearMonth);
+				if (configurations != null) {
+					for (int i = 0; i < configurations.size(); i++) {
+						ConfigValue listConfigValue = configurations.get(i);
+						if (listConfigValue.getConfigId() == configId) {
+							configurations.remove(i);
+							result = true;
+							break;
+						}
+					}
+					if (result == true) {
+						response = "Successfully deleted the selected configuration for the selected month.";
+					} else {
+						response = "The selected configuration is not found for the selected month.";
+					}
+				}
+			}
+			LOGGER.debug(
+					"STOP : removeOneConfigForYearMonth(String, ConfigValue) of " + this.getClass().getSimpleName());
+		} catch (Exception e) {
+			LOGGER.error("EXCEPTION : removeOneConfigForYearMonth(String, ConfigValue) of "
+					+ this.getClass().getSimpleName());
+		}
+		return response;
+	}
 }

configurationapp/src/main/java/com/att/data/configurations/ConfigValue.java

@@ -1,34 +1,63 @@
 package com.att.data.configurations;
 
 /**
- * Data Model
+ * Data Model - Configuration Value
  */
 public class ConfigValue {
-    private String configName;
-    private int configId;
-
-    public ConfigValue(String name, int id) {
-        this.configId = id;
-        this.configName = name;
-    }
-
-    public ConfigValue() {
-
-    }
-
-    public void setConfigName(String name) {
-        this.configName = name;
-    }
-
-    public String getConfigName() {
-        return this.configName;
-    }
-
-    public void setConfigId(int id) {
-        this.configId = id;
-    }
-
-    public int getConfigId() {
-        return this.configId;
-    }
+	private String configName;
+	private int configId;
+
+	/**
+	 * Constructor initialization with all properties.
+	 * 
+	 * @param name Configuration name
+	 * @param id   Configuration id
+	 */
+	public ConfigValue(String name, int id) {
+		this.configId = id;
+		this.configName = name;
+	}
+
+	/**
+	 * Default constructor.
+	 */
+	public ConfigValue() {
+
+	}
+
+	/**
+	 * To set configuration name
+	 * 
+	 * @param name configuration name
+	 */
+	public void setConfigName(String name) {
+		this.configName = name;
+	}
+
+	/**
+	 * To get configuration name
+	 * 
+	 * @return configuration name
+	 */
+	public String getConfigName() {
+		return this.configName;
+	}
+
+	/**
+	 * To set configuration id.
+	 * 
+	 * @param name configuration id
+	 */
+	public void setConfigId(int id) {
+		this.configId = id;
+	}
+
+	/**
+	 * To get configuration id
+	 * 
+	 * @return configuration id
+	 */
+	public int getConfigId() {
+		return this.configId;
+	}
 }