Package zipkin2.storage

Class InMemoryStorage

  • All Implemented Interfaces:
    Closeable, AutoCloseable, AutocompleteTags, ServiceAndSpanNames, SpanConsumer, SpanStore, Traces
    public final class InMemoryStorage
extends StorageComponent
implements SpanStore, SpanConsumer, AutocompleteTags, ServiceAndSpanNames, Traces
    Test storage component that keeps all spans in memory, accepting them on the calling thread.

    Internally, spans are indexed on 64-bit trace ID

    Here's an example of some traces in memory: 

    
 spansByTraceIdTimeStamp:
    <aaaa,July 4> --> ( spanA(time:July 4, traceId:aaaa, service:foo, name:GET),
                        spanB(time:July 4, traceId:aaaa, service:bar, name:GET) )
    <cccc,July 4> --> ( spanC(time:July 4, traceId:aaaa, service:foo, name:GET) )
    <bbbb,July 5> --> ( spanD(time:July 5, traceId:bbbb, service:biz, name:GET) )
    <bbbb,July 6> --> ( spanE(time:July 6, traceId:bbbb) service:foo, name:POST )

 traceIdToTraceIdTimeStamps:
    aaaa --> [ <aaaa,July 4> ]
    bbbb --> [ <bbbb,July 5>, <bbbb,July 6> ]
    cccc --> [ <cccc,July 4> ]

 serviceToTraceIds:
    foo --> [ <aaaa>, <cccc>, <bbbb> ]
    bar --> [ <aaaa> ]
    biz --> [ <bbbb> ]

 serviceToSpanNames:
    bar --> ( GET )
    biz --> ( GET )
    foo --> ( GET, POST )