add more message for java-doc (#1209)

* move updateTaskState into try/catch block in case of exception

* fix NPE

* using conf.getInt instead of getString

* for AbstractZKClient, remove the log, for it will print the same log message in createZNodePath.
for AlertDao, correct the spelling.

* duplicate

* refactor getTaskWorkerGroupId

* add friendly log

* update hearbeat thread num = 1

* fix the bug when worker execute task using queue. and remove checking Tenant user anymore in TaskScheduleThread

* 1. move verifyTaskInstanceIsNull after taskInstance
2. keep verifyTenantIsNull/verifyTaskInstanceIsNull clean and readable

* fix the message

* delete before check to avoid KeeperException$NoNodeException

* fix the message

* check processInstance state before delete tenant

* check processInstance state before delete worker group

* refactor

* merge api constants into common constatns

* update the resource perm

* update the dataSource perm

* fix CheckUtils.checkUserParams method

* update AlertGroupService, extends from BaseService, remove duplicate methods

* refactor

* modify method name

* add hasProjectAndPerm method

* using checkProject instead of getResultStatus

* delete checkAuth method, using hasProjectAndPerm instead.

* correct spelling

* add transactional for deleteWorkerGroupById

* add Transactional for deleteProcessInstanceById method

* change sqlSessionTemplate singleton

* change sqlSessionTemplate singleton and reformat code

* fix unsuitable error message

* update shutdownhook methods

* fix worker log bug

* fix api server debug mode bug

* upgrade zk version

* delete this line ,for zkClient.close() will do the whole thing

* fix master server shutdown error

* degrade zk version and add FourLetterWordMain class

* fix PathChildrenCache not close

* add Transactional for createSession method

* add more message for java-doc

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/manager/EmailManager.java

@@ -28,12 +28,12 @@ import java.util.Map;
 public class EmailManager {
     /**
      * email send
-     * @param receviersList
-     * @param receviersCcList
-     * @param title
-     * @param content
-     * @param showType
-     * @return
+     * @param receviersList the receiver list
+     * @param receviersCcList the cc List
+     * @param title the title
+     * @param content the content
+     * @param showType the showType
+     * @return the send result
      */
     public Map<String,Object> send(List<String> receviersList,List<String> receviersCcList,String title,String content,ShowType showType){
 
@@ -42,11 +42,11 @@ public class EmailManager {
 
     /**
      * msg send
-     * @param receviersList
-     * @param title
-     * @param content
-     * @param showType
-     * @return
+     * @param receviersList the receiver list
+     * @param title the title
+     * @param content the content
+     * @param showType the showType
+     * @return the send result
      */
     public Map<String,Object> send(List<String> receviersList,String title,String content,ShowType showType){
 

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/manager/EnterpriseWeChatManager.java

@@ -35,7 +35,9 @@ public class EnterpriseWeChatManager {
     private static final Logger logger = LoggerFactory.getLogger(MsgManager.class);
     /**
      * Enterprise We Chat send
-     * @param alert
+     * @param alert the alert
+     * @param token the token
+     * @return the send result
      */
     public Map<String,Object> send(Alert alert, String token){
         Map<String,Object> retMap = new HashMap<>();

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/manager/MsgManager.java

@@ -28,7 +28,7 @@ public class MsgManager  {
     private static final Logger logger = LoggerFactory.getLogger(MsgManager.class);
     /**
      * SMS send
-     * @param alert
+     * @param alert the alert
      */
     public void send(Alert alert){
         logger.info("send message {}",alert);

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/EnterpriseWeChatUtils.java

@@ -80,7 +80,7 @@ public class EnterpriseWeChatUtils {
     /**
      * get Enterprise WeChat token info
      * @return token string info
-     * @throws IOException
+     * @throws IOException the IOException
      */
     public static String getToken() throws IOException {
         String resp;
@@ -104,9 +104,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * make team single Enterprise WeChat message
-     * @param toParty
-     * @param agentId
-     * @param msg
+     * @param toParty the toParty
+     * @param agentId the agentId
+     * @param msg the msg
      * @return Enterprise WeChat send message
      */
     public static String makeTeamSendMsg(String toParty, String agentId, String msg) {
@@ -117,9 +117,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * make team multi Enterprise WeChat message
-     * @param toParty
-     * @param agentId
-     * @param msg
+     * @param toParty the toParty
+     * @param agentId the agentId
+     * @param msg the msg
      * @return Enterprise WeChat send message
      */
     public static String makeTeamSendMsg(Collection<String> toParty, String agentId, String msg) {
@@ -131,9 +131,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * make team single user message
-     * @param toUser
-     * @param agentId
-     * @param msg
+     * @param toUser the toUser
+     * @param agentId the agentId
+     * @param msg the msg
      * @return Enterprise WeChat send message
      */
     public static String makeUserSendMsg(String toUser, String agentId, String msg) {
@@ -144,9 +144,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * make team multi user message
-     * @param toUser
-     * @param agentId
-     * @param msg
+     * @param toUser the toUser
+     * @param agentId the agentId
+     * @param msg the msg
      * @return Enterprise WeChat send message
      */
     public static String makeUserSendMsg(Collection<String> toUser, String agentId, String msg) {
@@ -158,11 +158,11 @@ public class EnterpriseWeChatUtils {
 
     /**
      * send Enterprise WeChat
-     * @param charset
-     * @param data
-     * @param token
+     * @param charset the charset
+     * @param data the data
+     * @param token the token
      * @return Enterprise WeChat resp, demo: {"errcode":0,"errmsg":"ok","invaliduser":""}
-     * @throws IOException
+     * @throws IOException the IOException
      */
     public static String sendEnterpriseWeChat(String charset, String data, String token) throws IOException {
         String enterpriseWeChatPushUrlReplace = enterpriseWeChatPushUrl.replaceAll("\\$token", token);
@@ -185,9 +185,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * convert table to markdown style
-     * @param title
-     * @param content
-     * @return
+     * @param title the title
+     * @param content the content
+     * @return markdown table content
      */
     public static String markdownTable(String title,String content){
         List<LinkedHashMap> mapItemsList = JSONUtils.toList(content, LinkedHashMap.class);
@@ -214,9 +214,9 @@ public class EnterpriseWeChatUtils {
 
     /**
      * convert text to markdown style
-     * @param title
-     * @param content
-     * @return
+     * @param title the title
+     * @param content the content
+     * @return markdown text
      */
     public static String markdownText(String title,String content){
         if (StringUtils.isNotEmpty(content)){
@@ -244,8 +244,8 @@ public class EnterpriseWeChatUtils {
 
     /**
      * Determine the mardown style based on the show type of the alert
-     * @param alert
-     * @return
+     * @param alert the alert
+     * @return the markdown alert table/text
      */
     public static String markdownByAlert(Alert alert){
         String result = "";

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/ExcelUtils.java

@@ -35,11 +35,9 @@ public class ExcelUtils {
     private static final Logger logger = LoggerFactory.getLogger(ExcelUtils.class);
     /**
      * generate excel file
-     * @param content
-     * @param title
-     * @param xlsFilePath
-     * @return
-     * @throws Exception
+     * @param content the content
+     * @param title the title
+     * @param xlsFilePath the xls path
      */
     public static void genExcelFile(String content,String title,String xlsFilePath){
         List<LinkedHashMap> itemsList;

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/JSONUtils.java

@@ -33,7 +33,7 @@ public class JSONUtils {
 
   /**
    * object to json string
-   * @param object
+   * @param object the object to be converted to json
    * @return json string
    */
   public static String toJsonString(Object object) {
@@ -47,10 +47,10 @@ public class JSONUtils {
   /**
    * json to list
    *
-   * @param json
+   * @param json the json
    * @param clazz c
-   * @param <T>
-   * @return
+   * @param <T> the generic clazz
+   * @return the result list
    */
   public static <T> List<T> toList(String json, Class<T> clazz) {
     if (StringUtils.isEmpty(json)) {

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/MailUtils.java

@@ -92,11 +92,11 @@ public class MailUtils {
 
     /**
      * send mail to receivers
-     *
-     * @param receivers
-     * @param title
-     * @param content
-     * @return
+     * @param receivers the receiver list
+     * @param title the title
+     * @param content the content
+     * @param showType the show type
+     * @return the result map
      */
     public static Map<String,Object> sendMails(Collection<String> receivers, String title, String content,ShowType showType) {
         return sendMails(receivers, null, title, content, showType);
@@ -104,12 +104,12 @@ public class MailUtils {
 
     /**
      * send mail
-     * @param receivers
-     * @param receiversCc cc
-     * @param title title
-     * @param content content
-     * @param showType mail type
-     * @return
+     * @param receivers the receiver list
+     * @param receiversCc cc list
+     * @param title the title
+     * @param content the content
+     * @param showType the show type
+     * @return the send result
      */
     public static Map<String,Object> sendMails(Collection<String> receivers, Collection<String> receiversCc, String title, String content, ShowType showType) {
         Map<String,Object> retMap = new HashMap<>();
@@ -169,9 +169,9 @@ public class MailUtils {
 
     /**
      * html table content
-     * @param content
-     * @param showAll
-     * @return
+     * @param content the content
+     * @param showAll if show the whole content
+     * @return the html table form
      */
     private static String htmlTable(String content, boolean showAll){
         if (StringUtils.isNotEmpty(content)){
@@ -198,7 +198,7 @@ public class MailUtils {
 
                     Map.Entry<String, String> entry = iterator.next();
                     t.append(Constants.TH).append(entry.getKey()).append(Constants.TH_END);
-                    cs.append(Constants.TD).append(String.valueOf(entry.getValue())).append(Constants.TD_END);
+                    cs.append(Constants.TD).append(entry.getValue()).append(Constants.TD_END);
 
                 }
                 t.append(Constants.TR_END);
@@ -218,8 +218,8 @@ public class MailUtils {
 
     /**
      * html table content
-     * @param content
-     * @return
+     * @param content the content
+     * @return the html table form
      */
     private static String htmlTable(String content){
         return htmlTable(content,true);
@@ -227,8 +227,8 @@ public class MailUtils {
 
     /**
      * html text content
-     * @param content
-     * @return
+     * @param content the content
+     * @return text in html form
      */
     private static String htmlText(String content){
 
@@ -260,9 +260,8 @@ public class MailUtils {
 
     /**
      * send mail as Excel attachment
-     *
-     * @param receivers
-     * @param title
+     * @param receivers the receiver list
+     * @param title the title
      * @throws Exception
      */
     private static void attachment(Collection<String> receivers,Collection<String> receiversCc,String title,String content,String partContent)throws Exception{
@@ -274,12 +273,10 @@ public class MailUtils {
     /**
      * get MimeMessage
      * @param receivers
-     * @return
+     * @return the MimeMessage
      * @throws MessagingException
      */
     private static MimeMessage getMimeMessage(Collection<String> receivers) throws MessagingException {
-//        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
-//        final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
 
         // 1. The first step in creating mail: creating session
         Session session = getSession();
@@ -299,7 +296,7 @@ public class MailUtils {
 
     /**
      * get session
-     * @return
+     * @return the new Session
      */
     private static Session getSession() {
         Properties props = new Properties();
@@ -324,12 +321,12 @@ public class MailUtils {
     }
 
     /**
-     *
-     * @param receiversCc
-     * @param title
-     * @param content
-     * @param partContent
-     * @param msg
+     * attach content
+     * @param receiversCc the cc list
+     * @param title the title
+     * @param content the content
+     * @param partContent the partContent
+     * @param msg the message
      * @throws MessagingException
      * @throws IOException
      */
@@ -369,13 +366,13 @@ public class MailUtils {
     }
 
     /**
-     *
-     * @param title
-     * @param content
-     * @param showType
-     * @param retMap
-     * @param email
-     * @return
+     * the string object map
+     * @param title the title
+     * @param content the content
+     * @param showType the showType
+     * @param retMap the result map
+     * @param email the email
+     * @return the result map
      * @throws EmailException
      */
     private static Map<String, Object> getStringObjectMap(String title, String content, ShowType showType, Map<String, Object> retMap, HtmlEmail email) throws EmailException {
@@ -403,7 +400,7 @@ public class MailUtils {
 
     /**
      * file delete
-     * @param file
+     * @param file the file to delete
      */
     public static void deleteFile(File file){
         if(file.exists()){
@@ -419,10 +416,10 @@ public class MailUtils {
 
 
     /**
-     *
-     * @param receivers
-     * @param retMap
-     * @param e
+     * handle exception
+     * @param receivers the receiver list
+     * @param retMap the result map
+     * @param e the exception
      */
     private static void handleException(Collection<String> receivers, Map<String, Object> retMap, Exception e) {
         logger.error("Send email to {} failed", StringUtils.join(",", receivers), e);
@@ -430,10 +427,10 @@ public class MailUtils {
     }
 
     /**
-     *
-     * @param title
-     * @param content
-     * @return
+     * get the content of the template
+     * @param title the title
+     * @param content the content to retrieve
+     * @return the content in the template or null if exception occurs
      */
     private static String getTemplateContent(String title,String content){
         StringWriter out = new StringWriter();

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/PropertyUtils.java

@@ -68,9 +68,8 @@ public class PropertyUtils {
 
     /**
      * get property value
-     *
      * @param key property name
-     * @return
+     * @return the value
      */
     public static String getString(String key) {
         return properties.getProperty(key);
@@ -87,10 +86,10 @@ public class PropertyUtils {
     }
 
     /**
-     *
-     * @param key
-     * @param defaultValue
-     * @return
+     * get int value
+     * @param key the key
+     * @param defaultValue the default value
+     * @return the value related the key or the default value if the key not existed
      */
     public static int getInt(String key, int defaultValue) {
         String value = getString(key);
@@ -108,9 +107,8 @@ public class PropertyUtils {
 
     /**
      * get property value
-     *
      * @param key property name
-     * @return
+     * @return  the boolean result value
      */
     public static Boolean getBoolean(String key) {
         String value = properties.getProperty(key.trim());
@@ -122,19 +120,19 @@ public class PropertyUtils {
     }
 
     /**
-     *
-     * @param key
-     * @return
+     * get long value
+     * @param key the key
+     * @return if the value not existed, return -1, or will return the related value
      */
     public static long getLong(String key) {
         return getLong(key,-1);
     }
 
     /**
-     *
-     * @param key
-     * @param defaultVal
-     * @return
+     * get long value
+     * @param key the key
+     * @param defaultVal the default value
+     * @return the value related the key or the default value if the key not existed
      */
     public static long getLong(String key, long defaultVal) {
         String val = getString(key);
@@ -143,10 +141,10 @@ public class PropertyUtils {
 
 
     /**
-     *
-     * @param key
-     * @param defaultVal
-     * @return
+     * get double value
+     * @param key the key
+     * @param defaultVal the default value
+     * @return the value related the key or the default value if the key not existed
      */
     public double getDouble(String key, double defaultVal) {
         String val = getString(key);
@@ -158,7 +156,7 @@ public class PropertyUtils {
      *  get array
      * @param key       property name
      * @param splitStr  separator
-     * @return
+     * @return the result array
      */
     public static String[] getArray(String key, String splitStr) {
         String value = getString(key);
@@ -175,11 +173,11 @@ public class PropertyUtils {
     }
 
     /**
-     *
-     * @param key
-     * @param type
-     * @param defaultValue
-     * @param <T>
+     * get enum
+     * @param key the key
+     * @param type the class type
+     * @param defaultValue the default value
+     * @param <T> the generic class type
      * @return  get enum value
      */
     public <T extends Enum<T>> T getEnum(String key, Class<T> type,