Spring Cloud Sleuth 覆蓋Zipkin的自動(dòng)配置

Spring Cloud Sleuth支持從2.1.0版開始將跟蹤發(fā)送到多個(gè)跟蹤系統(tǒng)。為了使它起作用，每個(gè)跟蹤系統(tǒng)都需要具有Reporter<Span>和Sender。如果要覆蓋提供的beans，則需要給它們指定一個(gè)特定的名稱。為此，您可以分別使用ZipkinAutoConfiguration.REPORTER_BEAN_NAME和ZipkinAutoConfiguration.SENDER_BEAN_NAME。

@Configuration
protected static class MyConfig {

	@Bean(ZipkinAutoConfiguration.REPORTER_BEAN_NAME)
	Reporter<zipkin2.Span> myReporter() {
		return AsyncReporter.create(mySender());
	}

	@Bean(ZipkinAutoConfiguration.SENDER_BEAN_NAME)
	MySender mySender() {
		return new MySender();
	}

	static class MySender extends Sender {

		private boolean spanSent = false;

		boolean isSpanSent() {
			return this.spanSent;
		}

		@Override
		public Encoding encoding() {
			return Encoding.JSON;
		}

		@Override
		public int messageMaxBytes() {
			return Integer.MAX_VALUE;
		}

		@Override
		public int messageSizeInBytes(List<byte[]> encodedSpans) {
			return encoding().listSizeInBytes(encodedSpans);
		}

		@Override
		public Call<Void> sendSpans(List<byte[]> encodedSpans) {
			this.spanSent = true;
			return Call.create(null);
		}

	}

}