cassandra - Hector 是否提供 API 来支持复合键？

Question

现在，我必须通过将子键格式化在一起来手动生成复合键。这很丑陋而且效率不高。我想知道 Hector 是否提供了这样一组 API 来以更体面的方式处理复合键。

Answer 1

是的，它确实。

您可以查看 DynamicCompositeTest 的示例：

https://github.com/rantav/hector/blob/master/core/src/test/java/me/prettyprint/hector/api/beans/DynamicCompositeTest.java

@Test
public void allTypesSerialize() {
    DynamicComposite composite = new DynamicComposite();

    UUID lexUUID = UUID.randomUUID();
    com.eaio.uuid.UUID timeUUID = new com.eaio.uuid.UUID();


    //add all forward comparators
    composite.addComponent(0, "AsciiText", AsciiSerializer.get(), "AsciiType", ComponentEquality.EQUAL);
    composite.addComponent(1, new byte[]{0, 1, 2, 3}, BytesArraySerializer.get(), "BytesType", ComponentEquality.EQUAL);
    composite.addComponent(2, -1, IntegerSerializer.get(), "IntegerType", ComponentEquality.EQUAL);
    composite.addComponent(3,  lexUUID, UUIDSerializer.get(), "LexicalUUIDType", ComponentEquality.EQUAL);
    composite.addComponent(4, -1l, LongSerializer.get(), "LongType", ComponentEquality.EQUAL);
    composite.addComponent(5, timeUUID, TimeUUIDSerializer.get(), "TimeUUIDType", ComponentEquality.EQUAL);
    composite.addComponent(6, "UTF8Text", StringSerializer.get(), "UTF8Type", ComponentEquality.EQUAL);
    composite.addComponent(7,  lexUUID, UUIDSerializer.get(), "UUIDType", ComponentEquality.EQUAL);