java - Couchbase 的 memcached 实现中 Java 和 .Net 之间的数据共享

Question

我正在尝试在 Java 和 .Net 之间共享存储在 couchbase memcached 存储桶中的数据。

我能够在 .Net 中读取 Java 中的字符串集，但每当我尝试在 Java 中读取 .Net 中的字符串集时，结果都是 Null。

那么是否可以在 couchbase 服务器的 memcache 存储桶中的 .Net 和 Java 之间交换数据。

Answer 1

谢谢你的回复，我已经明白了。

.NET 能够读取 Java 中设置的字符串的原因是，如果 enyimMemcached 库无法识别该标志，则它会将缓存项解释为字符串。

因此，为了能够读取 Java 中的字符串，我只是通过扩展 SpyObject 来创建自己的自定义转码器并将其设置为忽略该标志。然后我通过像这样的 get 调用传递自定义转码器，

_obj = GetMemcachedClient().get(key, new StringTranscoder())

我的 StringTranscoder 类看起来像这样，

  /**
 * Copyright (C) 2006-2009 Dustin Sallings
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
 * IN THE SOFTWARE.
 */

package cachingjavatestapp;

import java.io.IOException;
import net.spy.memcached.CachedData;
import net.spy.memcached.compat.SpyObject;
import net.spy.memcached.transcoders.Transcoder;
import net.spy.memcached.transcoders.TranscoderUtils;

/**
 * Transcoder that serializes and unserializes longs.
 */
public final class StringTranscoder extends SpyObject implements
    Transcoder<String> {

  private static final int FLAGS = 0;

  public boolean asyncDecode(CachedData d) {
    return false;
  }

  public CachedData encode(java.lang.String l) {
        try{
            return new CachedData(FLAGS, l.getBytes("UTF-8"), getMaxSize());
        }
        catch (Exception e){
            return null;
        }
    }


  public String decode(CachedData d) {
        try{
            return new String(d.getData(), "UTF-8");
        }catch(Exception e){
            return null;
        }
  }

  public int getMaxSize() {
    return CachedData.MAX_SIZE;
  }
}

为了能够在.NET和Java之间交换数据。我只是使用 json.net 库和 gson 库来序列化对象，并将 json 字符串传递到 memcached，在 memcached 中将其作为字符串拾取，然后使用 json 库进行反序列化。

问候，