java - 无法在ChronicleMap中关闭 map

Question

根据文档，关闭https://github.com/OpenHFT/Chronicle-Map/blob/master/docs/CM_Tutorial.adoc#close-chroniclemap是一个好习惯

由于某些原因，我无法:

Map<String, String> lexicalizationGraph = ChronicleMap
                .of(String.class, String.class)
                .name("lexicalizations-chronicle-map")
                .constantKeySizeBySample("bn:14271053n")
                .averageValue("average size of value")
                .entries(1_000_000_000L)
                .createPersistedTo(file);

然后再:

lexicalizationGraph.close();

它给了我以下错误:

symbol:   method close()
  location: variable lexicalizationGraph of type java.util.Map<java.lang.String,java.lang.String>

我该如何关闭？

Answer 1

close方法是在ChronicleMap中定义的，而不是在Map中定义的。要访问它，您必须将变量定义为ChronicleMap(或在想要close()时显式转换它，但不要这样做):

ChronicleMap<String, String> lexicalizationGraph = ChronicleMap 
                .of(String.class, String.class)
                .name("lexicalizations-chronicle-map")
                .constantKeySizeBySample("bn:14271053n")
                .averageValue("average size of value")
                .entries(1_000_000_000L)
                .createPersistedTo(file);