java - 如何解决ignitecheckedException : make sure all objects in cache configuration are serializable

Question

我正在使用 Spring Boot 运行 Ignite。我的目的是在 Ignite 中对 BinaryObject 执行 SqlFieldQuery，提到我没有任何实体类，在运行时使用 QueryEntity 创建实体。这是我的以下代码:

 CacheConfiguration<Integer, BinaryObject> cachecfg = new CacheConfiguration<>();   
 cachecfg.setQueryEntities(new ArrayList<QueryEntity>() 
{
 {

            QueryEntity e = new QueryEntity();
            e.setKeyType("java.lang.Integer");
            e.setValueType("BinaryTest");
            e.setFields(new LinkedHashMap<String, String>() {
                {
                    put("name", "java.lang.String");
                }
            });
            add(e);
        }
    });
    cachecfg.setName("MY_CACHE");
    IgniteCache<Integer, BinaryObject> ignitecache = igniteInstance.createCache(cachecfg).withKeepBinary();
    BinaryObjectBuilder builder = igniteInstance.binary().builder("BinaryTest");
    builder.setField("name", "Test");
    ignitecache.put(1, builder.build());
    QueryCursor<List<?>> query = ignitecache.query(new SqlFieldsQuery("select name from BinaryTest"));
    System.out.println(query.getAll());

当我运行此代码时，出现错误:

class org.apache.ignite.IgniteCheckedException: Failed to validate cache 
configuration (make sure all objects in cache configuration are 
serializable): MY_CACHE

我可能缺少一些序列化配置。有什么问题吗？

Answer 1

摆脱双括号初始化，在这种情况下，您最终会得到一个匿名类，它是具有实例初始值设定项的 ArrayList 的子类。匿名类始终包含对封闭类的引用，在您的情况下，它试图被序列化。

所以选择:

    CacheConfiguration<Integer, BinaryObject> cachecfg = new CacheConfiguration<>();

    QueryEntity e = new QueryEntity();
    e.setKeyType("java.lang.Integer");
    e.setValueType("BinaryTest");

    LinkedHashMap<String, String> map = new LinkedHashMap<String, String>();
    map.put("name", "java.lang.String");
    e.setFields(map);

    ArrayList<QueryEntity> list = new ArrayList<QueryEntity>();
    list.add(e);
    cachecfg.setQueryEntities(list);
    cachecfg.setName("MY_CACHE");
    IgniteCache<Integer, BinaryObject> ignitecache = igniteInstance.createCache(cachecfg).withKeepBinary();