config/src/main/java/com/alibaba/nacos/config/server/controller/ConfigServletInner.java [263:277]:
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    private String resolvePullEvent(ConfigQueryChainResponse chainResponse, String tag) {
        switch (chainResponse.getStatus()) {
            case CONFIG_FOUND_GRAY:
                ConfigCacheGray matchedGray = chainResponse.getMatchedGray();
                if (matchedGray != null) {
                    return ConfigTraceService.PULL_EVENT + "-" + matchedGray.getGrayName();
                } else {
                    return ConfigTraceService.PULL_EVENT;
                }
            case SPECIAL_TAG_CONFIG_NOT_FOUND:
                return ConfigTraceService.PULL_EVENT + "-" + TagGrayRule.TYPE_TAG + "-" + tag;
            default:
                return ConfigTraceService.PULL_EVENT;
        }
    }
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config/src/main/java/com/alibaba/nacos/config/server/remote/ConfigQueryRequestHandler.java [171:185]:
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    private String resolvePullEventType(ConfigQueryChainResponse chainResponse, String tag) {
        switch (chainResponse.getStatus()) {
            case CONFIG_FOUND_GRAY:
                ConfigCacheGray matchedGray = chainResponse.getMatchedGray();
                if (matchedGray != null) {
                    return ConfigTraceService.PULL_EVENT + "-" + matchedGray.getGrayName();
                } else {
                    return ConfigTraceService.PULL_EVENT;
                }
            case SPECIAL_TAG_CONFIG_NOT_FOUND:
                return ConfigTraceService.PULL_EVENT + "-" + TagGrayRule.TYPE_TAG + "-" + tag;
            default:
                return ConfigTraceService.PULL_EVENT;
        }
    }
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