双检锁

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/ActionSearchManager.java

@@ -28,11 +28,13 @@ public class ActionSearchManager implements AlphaFineSearchProvider {
     private SearchResult moreModelList;
 
     public static ActionSearchManager getInstance() {
+        if (instance == null) {
             synchronized (ActionSearchManager.class) {
                 if (instance == null) {
                     instance = new ActionSearchManager();
                 }
             }
+        }
         return instance;
     }
 

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/DocumentSearchManager.java

@@ -25,11 +25,13 @@ public class DocumentSearchManager implements AlphaFineSearchProvider {
     private SearchResult moreModelList;
 
     public static DocumentSearchManager getInstance() {
+        if (instance == null) {
             synchronized (DocumentSearchManager.class) {
                 if (instance == null) {
                     instance = new DocumentSearchManager();
                 }
             }
+        }
         return instance;
     }
 

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/FileSearchManager.java

@@ -35,7 +35,7 @@ public class FileSearchManager implements AlphaFineSearchProvider {
     private static final String DS_NAME = "dsname=\"";
     private static final String FRM_PREFIX = "k:frm ";
     private static final String CPT_PREFIX = "k:cpt ";
-    private static FileSearchManager fileSearchManager;
+    private static FileSearchManager instance;
     private SearchResult filterModelList;
     private SearchResult lessModelList;
     private SearchResult moreModelList;
@@ -48,12 +48,14 @@ public class FileSearchManager implements AlphaFineSearchProvider {
     private boolean isContainFrm = true;
 
     public static FileSearchManager getInstance() {
+        if (instance == null) {
             synchronized (FileSearchManager.class) {
-            if (fileSearchManager == null) {
+                if (instance == null) {
-                fileSearchManager = new FileSearchManager();
+                    instance = new FileSearchManager();
                 }
             }
-        return fileSearchManager;
+        }
+        return instance;
     }
 
     public synchronized static void init() {

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/PluginSearchManager.java

@@ -32,11 +32,13 @@ public class PluginSearchManager implements AlphaFineSearchProvider {
 
 
     public static PluginSearchManager getInstance() {
+        if (instance == null) {
             synchronized (PluginSearchManager.class) {
                 if (instance == null) {
                     instance = new PluginSearchManager();
                 }
             }
+        }
         return instance;
 
     }

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/RecentSearchManager.java

@@ -60,12 +60,14 @@ public class RecentSearchManager implements AlphaFineSearchProvider {
     private SearchResult modelList;
 
     public static RecentSearchManager getInstance() {
+        if (instance == null) {
             synchronized (RecentSearchManager.class) {
                 if (instance == null) {
                     instance = new RecentSearchManager();
                     instance.initWriter();
                 }
             }
+        }
         return instance;
     }
 

designer-realize/src/main/java/com/fr/design/mainframe/alphafine/search/manager/impl/RecommendSearchManager.java

@@ -31,11 +31,13 @@ public class RecommendSearchManager implements AlphaFineSearchProvider {
     private SearchResult recommendModelList;
 
     public static RecommendSearchManager getInstance() {
+        if (instance == null) {
             synchronized (RecentSearchManager.class) {
                 if (instance == null) {
                     instance = new RecommendSearchManager();
                 }
             }
+        }
         return instance;
     }