更新说明：

1、moduleContext新增缓存策略，缓存上限5，缓存策略Lru

Signed-off-by: 明月清风 <qiufeihu1@h-partners.com>

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 2.1.2-rc.5
+- moduleContext新增缓存策略，缓存上限5，缓存策略Lru
+
 ## 2.1.2-rc.4
 - canvas新增抗锯齿
 - 修复图片缩放时出现重影

library/oh-package.json5

@@ -14,7 +14,7 @@
   "main": "index.ets",
   "repository": "https://gitee.com/openharmony-tpc/ImageKnife",
   "type": "module",
-  "version": "2.1.2-rc.4",
+  "version": "2.1.2-rc.5",
   "dependencies": {
     "pako": "^2.1.0",
     "@ohos/disklrucache": "^2.0.2-rc.0",

library/src/main/ets/components/cache/LruCache.ets

@@ -62,6 +62,11 @@ export class LruCache <K, V> {
     return preValue
   }
 
+  // 是否存在key
+  has(key: K): boolean {
+    return this.map.hasKey(key);
+  }
+
   /*
    * 替换或删除对应key键的数据
    * evicted：是否删除
@@ -135,5 +140,4 @@ export class LruCache <K, V> {
   foreachLruCache(fn: (value: V, key: K, map: Map<K, V>) => void) {
     this.map.each(fn);
   }
-
 }

library/src/main/ets/components/imageknife/compress/provider/RecourseProvider.ets

@@ -20,6 +20,7 @@ import { ImageKnifeGlobal } from '../../ImageKnifeGlobal';
 import resourceManager from '@ohos.resourceManager';
 import { BusinessError } from '@ohos.base'
 import common from '@ohos.app.ability.common';
+import { ContextCacheProxy } from '../../requestmanage/ContextCacheProxy';
 
 export class RecourseProvider extends CompressAdapter {
   private static CHARS: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
@@ -46,8 +47,11 @@ export class RecourseProvider extends CompressAdapter {
     if (!this._mResourceData) {
       throw Error("compress resource is empty");
     }
-    ((ImageKnifeGlobal.getInstance()
-      .getHapContext() as common.UIAbilityContext).createModuleContext(this._mResourceData.moduleName).resourceManager as resourceManager.ResourceManager)
+    let context = ContextCacheProxy.getInstance()
+      .contextGetValue(this._mResourceData.moduleName,
+        ImageKnifeGlobal.getInstance().getHapContext() as common.UIAbilityContext);
+    if (context != undefined) {
+      (context.resourceManager as resourceManager.ResourceManager)
         .getMediaContent(this._mResourceData.id)
         .then(data => {
           let buffer = this.uint8ArrayToBuffer(data);
@@ -61,7 +65,7 @@ export class RecourseProvider extends CompressAdapter {
         .catch((err: BusinessError) => {
           console.log("RecourseProvider openInternal err" + JSON.stringify(err as BusinessError));
         })
-
+    }
   }
 
   getPixelMapFormat(): PixelMapFormat | undefined {
@@ -70,6 +74,7 @@ export class RecourseProvider extends CompressAdapter {
     }
     return this.getFormat(this._mPixelMapHeader);
   }
+
   /**
    * data decode
    */

library/src/main/ets/components/imageknife/requestmanage/ContextCacheProxy.ets

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ICache } from "../requestmanage/ICache"
+import { LruCache } from "../../cache/LruCache"
+
+export class ContextCacheProxy implements ICache<string, Context> {
+  private mLruCache: LruCache<string, Context>;
+  private static cache: ContextCacheProxy = new ContextCacheProxy(new LruCache(5));
+
+  private constructor(lruCache: LruCache<string, Context>) {
+    this.mLruCache = lruCache;
+  }
+
+  public static getInstance(): ContextCacheProxy {
+    return ContextCacheProxy.cache;
+  }
+
+
+  // 缓存类型
+  getName() {
+    return "ContextCacheProxy"
+  }
+
+  contextGetValue(key: string, context: Context): Context | undefined{
+    if (this.hasValue(key)) {
+      return this.getValue(key);
+    } else {
+      let moduleContext = context.createModuleContext(key);
+      this.putValue(key, moduleContext)
+      return moduleContext;
+    }
+  }
+
+  getValue(key: string): Context | undefined {
+    return this.mLruCache.get(key);
+  }
+
+  hasValue(key: string): boolean {
+    return this.mLruCache.has(key);
+  }
+
+  putValue(key: string, value: Context) {
+    this.mLruCache.put(key, value);
+  }
+
+  removeValue(key: string): Context | undefined {
+    return this.mLruCache.remove(key);
+  }
+
+  clear() {
+    this.mLruCache.evicAll();
+  }
+
+
+  // 外界调用
+  loadMemoryCache(key: string, isMemoryCacheable: boolean): Context | null {
+    // 是否开启内存缓存
+    if (!isMemoryCacheable) {
+      return null;
+    }
+    let cached = this.getValue(key)
+    if (cached != null) {
+      return cached;
+    }
+    return null;
+  }
+}

library/src/main/ets/components/imageknife/resourcemanage/ParseResClient.ets

@@ -19,12 +19,17 @@ import resourceManager from '@ohos.resourceManager';
 import { ImageKnifeGlobal } from '../ImageKnifeGlobal';
 import { BusinessError } from '@ohos.base'
 import common from '@ohos.app.ability.common';
+import { ContextCacheProxy } from '../requestmanage/ContextCacheProxy';
+
 export class ParseResClient implements IResourceFetch<ArrayBuffer> {
   loadResource(context: common.UIAbilityContext, res: Resource, onCompleteFunction: (value: ArrayBuffer) => void | PromiseLike<ArrayBuffer>, onErrorFunction: (reason?: BusinessError | string) => void) {
     let resId = res.id;
     let resType = res.type;
     if (resType == ResourceTypeEts.MEDIA) {
-      (context.createModuleContext(res.moduleName).resourceManager as resourceManager.ResourceManager)
+      let moduleContext = ContextCacheProxy.getInstance()
+        .contextGetValue(res.moduleName, context);
+      if (moduleContext != undefined) {
+        (moduleContext.resourceManager as resourceManager.ResourceManager)
           .getMediaContent(resId)
           .then(data => {
             let arrayBuffer = this.typedArrayToBuffer(data);
@@ -34,6 +39,8 @@ export class ParseResClient implements IResourceFetch<ArrayBuffer> {
             onErrorFunction(err)
           })
       }
+
+    }
     else if (resType == ResourceTypeEts.RAWFILE) {
       onErrorFunction('ParseResClient 本地资源是rawfile暂时无法解析出错')
     } else {

library/src/main/ets/components/imageknife/resourcemanage/ParseResClientBase64.ets

@@ -20,13 +20,16 @@ import { BusinessError } from '@ohos.base'
 import resourceManager from '@ohos.resourceManager';
 import { ImageKnifeGlobal } from '../ImageKnifeGlobal';
 import common from '@ohos.app.ability.common'
+import { ContextCacheProxy } from '../requestmanage/ContextCacheProxy'
 
 export class ParseResClientBase64 implements IResourceFetch<ArrayBuffer> {
   loadResource(context: common.UIAbilityContext, res: Resource, onCompleteFunction: (value: ArrayBuffer) => void | PromiseLike<ArrayBuffer>, onErrorFunction: (reason?: BusinessError | string) => void) {
     let resId = res.id;
     let resType = res.type;
     if (resType == ResourceTypeEts.MEDIA) {
-      (context.createModuleContext(res.moduleName).resourceManager as resourceManager.ResourceManager)
+      let moduleContext = ContextCacheProxy.getInstance()
+        .contextGetValue(res.moduleName, context);
+      (moduleContext.resourceManager as resourceManager.ResourceManager)
         .getMediaContentBase64(resId)
         .then(data => {
           let matchReg = ';base64,';

library/src/main/ets/components/imageknife/transform/MaskTransformation.ets

@@ -26,6 +26,7 @@ import resourceManager from '@ohos.resourceManager'
 import { BusinessError } from '@ohos.base'
 import {Size} from '../../imageknife/RequestOption'
 import common from '@ohos.app.ability.common'
+import { ContextCacheProxy } from '../requestmanage/ContextCacheProxy'
 
 export class MaskTransformation implements BaseTransform<PixelMap> {
   private _mResourceData:Resource|undefined = undefined;
@@ -96,7 +97,10 @@ export class MaskTransformation implements BaseTransform<PixelMap> {
     let context = (request.getModuleContext() as common.UIAbilityContext)
     if(context != undefined){
       if(this._mResourceData != undefined){
-        let resourceManager = context.createModuleContext(this._mResourceData.moduleName).resourceManager as resourceManager.ResourceManager
+        let moduleContext = ContextCacheProxy.getInstance()
+          .contextGetValue(this._mResourceData.moduleName, context);
+        if (moduleContext != undefined) {
+          let resourceManager = moduleContext.resourceManager as resourceManager.ResourceManager
           if(resourceManager != undefined && this._mResourceData != undefined)
             resourceManager.getMediaContent(this._mResourceData?.id)
               .then(array => {
@@ -118,6 +122,8 @@ export class MaskTransformation implements BaseTransform<PixelMap> {
                 func?.asyncTransform("MaskTransformation openInternal error" + err, null);
               })
         }
+
+     }
     }
   }
 }