双检锁

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

@@ -28,9 +28,11 @@ public class ActionSearchManager implements AlphaFineSearchProvider {
     private SearchResult moreModelList;
 
     public static ActionSearchManager getInstance() {
-        synchronized (ActionSearchManager.class) {
-            if (instance == null) {
-                instance = new ActionSearchManager();
+        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

@@ -25,9 +25,11 @@ public class DocumentSearchManager implements AlphaFineSearchProvider {
     private SearchResult moreModelList;
 
     public static DocumentSearchManager getInstance() {
-        synchronized (DocumentSearchManager.class) {
-            if (instance == null) {
-                instance = new DocumentSearchManager();
+        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() {
-        synchronized (FileSearchManager.class) {
-            if (fileSearchManager == null) {
-                fileSearchManager = new FileSearchManager();
+        if (instance == null) {
+            synchronized (FileSearchManager.class) {
+                if (instance == null) {
+                    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

@@ -32,9 +32,11 @@ public class PluginSearchManager implements AlphaFineSearchProvider {
 
 
     public static PluginSearchManager getInstance() {
-        synchronized (PluginSearchManager.class) {
-            if (instance == null) {
-                instance = new PluginSearchManager();
+        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

@@ -60,10 +60,12 @@ public class RecentSearchManager implements AlphaFineSearchProvider {
     private SearchResult modelList;
 
     public static RecentSearchManager getInstance() {
-        synchronized (RecentSearchManager.class) {
-            if (instance == null) {
-                instance = new RecentSearchManager();
-                instance.initWriter();
+        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

@@ -31,9 +31,11 @@ public class RecommendSearchManager implements AlphaFineSearchProvider {
     private SearchResult recommendModelList;
 
     public static RecommendSearchManager getInstance() {
-        synchronized (RecentSearchManager.class) {
-            if (instance == null) {
-                instance = new RecommendSearchManager();
+        if (instance == null) {
+            synchronized (RecentSearchManager.class) {
+                if (instance == null) {
+                    instance = new RecommendSearchManager();
+                }
             }
         }
         return instance;