apm-sniffer/apm-sdk-plugin/mongodb-4.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/mongodb/v4/support/MongoOperationHelper.java [115:131]:
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    private static String getFilter(List<? extends WriteRequest> writeRequestList) {
        StringBuilder params = new StringBuilder();
        for (WriteRequest request : writeRequestList) {
            if (request instanceof InsertRequest) {
                params.append(((InsertRequest) request).getDocument().toString()).append(",");
            } else if (request instanceof DeleteRequest) {
                params.append(((DeleteRequest) request).getFilter()).append(",");
            } else if (request instanceof UpdateRequest) {
                params.append(((UpdateRequest) request).getFilter()).append(",");
            }
            final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
            if (filterLengthLimit > 0 && params.length() > filterLengthLimit) {
                return params.substring(0, filterLengthLimit) + "...";
            }
        }
        return params.toString();
    }
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apm-sniffer/apm-sdk-plugin/mongodb-3.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/mongodb/v3/support/MongoOperationHelper.java [118:134]:
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    private static String getFilter(List<? extends WriteRequest> writeRequestList) {
        StringBuilder params = new StringBuilder();
        for (WriteRequest request : writeRequestList) {
            if (request instanceof InsertRequest) {
                params.append(((InsertRequest) request).getDocument().toString()).append(",");
            } else if (request instanceof DeleteRequest) {
                params.append(((DeleteRequest) request).getFilter()).append(",");
            } else if (request instanceof UpdateRequest) {
                params.append(((UpdateRequest) request).getFilter()).append(",");
            }
            final int filterLengthLimit = MongoPluginConfig.Plugin.MongoDB.FILTER_LENGTH_LIMIT;
            if (filterLengthLimit > 0 && params.length() > filterLengthLimit) {
                return params.substring(0, filterLengthLimit) + "...";
            }
        }
        return params.toString();
    }
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