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POGAE/J Memcache : Cannot use as a key
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2012-12-16T08:39:48.293
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2012-12-17T12:40:39.287
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2012-12-16T16:50:32.893
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The <a href="https://developers.google.com/appengine/docs/java/memcache/overview" rel="nofollow">GAE doc</a> said: <pre><code>Keys and values can be of any Serializable type or class </code></pre> I use <a href="http://commons.apache.org/collections/apidocs/org/apache/commons/collections/keyvalue/MultiKey.html" rel="nofollow">MultiKey</a> as the key but after update my app, it gives me exception: <pre><code>java.lang.IllegalArgumentException: Cannot use as a key: 'MultiKey[class com.xx.xx.xx, Key<?>(Domain("xxx.com")/AppUser(2001)), -1, {}, [-lastModified, ]]' at com.google.appengine.api.memcache.AsyncMemcacheServiceImpl.makePbKey(AsyncMemcacheServiceImpl.java:251) at com.google.appengine.api.memcache.AsyncMemcacheServiceImpl.doGet(AsyncMemcacheServiceImpl.java:294) at com.google.appengine.api.memcache.AsyncMemcacheServiceImpl.get(AsyncMemcacheServiceImpl.java:306) at com.google.appengine.api.memcache.MemcacheServiceImpl.get(MemcacheServiceImpl.java:49) </code></pre> <a href="http://commons.apache.org/collections/apidocs/org/apache/commons/collections/keyvalue/MultiKey.html" rel="nofollow">MultiKey</a> is from apache commons-collections, which did implement Serializable <pre><code>public class MultiKey extends java.lang.Object implements java.io.Serializable </code></pre> Any ideas? Thanks. EDIT, the code is like below: <pre><code>MemcacheService ms = MemcacheServiceFactory.getMemcacheService(); MultiKey key=new MultiKey(xx, xx, xx...); ms.put( key, value ); ... </code></pre>
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<java><google-app-engine><memcached><apache-commons-collection>
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GAE/J Memcache : Cannot use as a key
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1. COAny other details? For example: code?
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2. COThe code is pretty straightforward, see my edit above.
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