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Chargebee telemetry handling #109
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2742928
Chargebee telemetry handling
cb-karthikp 81a8a4e
Update BaseResponse.java
cb-karthikp 272eb27
add testcase
cb-karthikp e100e46
add preferChargebeeTelemetry flag
cb-karthikp a1ab9cb
Merge branch 'v4' into feat/chargebee-telemetry
cb-karthikp ae99e67
add telemetry perference
cb-karthikp 5fdb8c8
Update BaseResponseTest.java
cb-karthikp 969c9d3
Update README.md
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235 changes: 235 additions & 0 deletions
235
src/main/java/com/chargebee/v4/telemetry/ChargebeeTelemetryHeaderParser.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,235 @@ | ||
| /* | ||
| * Copyright 2026 Chargebee Inc. | ||
| */ | ||
|
|
||
| package com.chargebee.v4.telemetry; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.regex.Pattern; | ||
|
|
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| /** Parses the {@code X-Chargebee-Telemetry} response header into OpenTelemetry span attributes. */ | ||
| public final class ChargebeeTelemetryHeaderParser { | ||
|
|
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| static final String SF_DATE_PREFIX = "@"; | ||
| static final String SF_BOOLEAN_TRUE = "?1"; | ||
| static final String SF_BOOLEAN_FALSE = "?0"; | ||
|
|
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| private static final Pattern INTEGER_PATTERN = Pattern.compile("-?\\d+"); | ||
| private static final Pattern DECIMAL_PATTERN = Pattern.compile("-?\\d+\\.\\d+"); | ||
|
|
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| private ChargebeeTelemetryHeaderParser() { | ||
| // utility class | ||
| } | ||
|
|
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| /** | ||
| * Parses a raw {@code X-Chargebee-Telemetry} header value into typed span attributes. | ||
| * | ||
| * @param headerValue raw header string | ||
| * @return parsed attributes, or empty map when input is null/blank or structurally invalid | ||
| */ | ||
| public static Map<String, Object> parseToSpanAttributes(String headerValue) { | ||
| if (headerValue == null || headerValue.trim().isEmpty()) { | ||
| return Collections.emptyMap(); | ||
| } | ||
|
|
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| try { | ||
| Map<String, Object> attributes = new HashMap<>(); | ||
| List<String> features = new ArrayList<>(); | ||
|
|
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| for (String item : splitListItems(headerValue)) { | ||
| parseListItem(item, attributes, features); | ||
| } | ||
|
|
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| if (!features.isEmpty()) { | ||
| attributes.put(TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_FEATURES, features); | ||
| } | ||
|
|
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| return attributes.isEmpty() ? Collections.emptyMap() : attributes; | ||
| } catch (RuntimeException ex) { | ||
| return Collections.emptyMap(); | ||
| } | ||
| } | ||
|
|
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| private static void parseListItem( | ||
| String item, Map<String, Object> attributes, List<String> features) { | ||
| String trimmed = item.trim(); | ||
| if (trimmed.isEmpty()) { | ||
| return; | ||
| } | ||
|
|
||
| int separator = indexOfParameterSeparator(trimmed); | ||
| String token = separator < 0 ? trimmed : trimmed.substring(0, separator).trim(); | ||
| if (token.isEmpty()) { | ||
| throw new IllegalArgumentException("missing sf-item token"); | ||
| } | ||
|
|
||
| if (token.startsWith(TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_FT_PREFIX)) { | ||
| features.add(token.substring(TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_FT_PREFIX.length())); | ||
| return; | ||
| } | ||
|
|
||
| String attributePrefix = segmentAttributePrefix(token); | ||
| if (separator >= 0) { | ||
| parseParameters(trimmed.substring(separator + 1), attributePrefix, attributes); | ||
| } | ||
| } | ||
|
|
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| private static String segmentAttributePrefix(String token) { | ||
| if (TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_CB_SEGMENT.equals(token)) { | ||
| return TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_CB_PREFIX; | ||
| } | ||
| if (token.startsWith(TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_TP_PREFIX)) { | ||
| return TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_TP_ATTRIBUTE_PREFIX | ||
| + token.substring(TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_TP_PREFIX.length()) | ||
| + "."; | ||
| } | ||
| return TelemetryAttributeKeys.CHARGEBEE_TELEMETRY_PREFIX + token + "."; | ||
| } | ||
|
|
||
| private static void parseParameters( | ||
| String parametersSection, String attributePrefix, Map<String, Object> attributes) { | ||
| for (String parameter : splitParameters(parametersSection)) { | ||
| parseParameter(parameter, attributePrefix, attributes); | ||
| } | ||
| } | ||
|
|
||
| private static void parseParameter( | ||
| String parameter, String attributePrefix, Map<String, Object> attributes) { | ||
| String trimmed = parameter.trim(); | ||
| if (trimmed.isEmpty()) { | ||
| return; | ||
| } | ||
|
|
||
| int equalsIndex = indexOfEquals(trimmed); | ||
| if (equalsIndex <= 0) { | ||
| throw new IllegalArgumentException("invalid parameter: " + trimmed); | ||
| } | ||
|
|
||
| String key = trimmed.substring(0, equalsIndex).trim(); | ||
| String rawValue = trimmed.substring(equalsIndex + 1).trim(); | ||
| if (key.isEmpty()) { | ||
| throw new IllegalArgumentException("missing parameter key"); | ||
| } | ||
|
|
||
| attributes.put(attributePrefix + key, parseScalarValue(rawValue)); | ||
| } | ||
|
|
||
| static Object parseScalarValue(String rawValue) { | ||
| if (rawValue == null || rawValue.isEmpty()) { | ||
| throw new IllegalArgumentException("missing scalar value"); | ||
| } | ||
|
|
||
| if (rawValue.startsWith(SF_DATE_PREFIX)) { | ||
| return Long.parseLong(rawValue.substring(SF_DATE_PREFIX.length())); | ||
| } | ||
| if (SF_BOOLEAN_TRUE.equals(rawValue)) { | ||
| return Boolean.TRUE; | ||
| } | ||
| if (SF_BOOLEAN_FALSE.equals(rawValue)) { | ||
| return Boolean.FALSE; | ||
| } | ||
| if (rawValue.startsWith(":") && rawValue.endsWith(":") && rawValue.length() >= 2) { | ||
| return rawValue.substring(1, rawValue.length() - 1); | ||
| } | ||
| if (rawValue.startsWith("\"")) { | ||
| return parseStringValue(rawValue); | ||
| } | ||
| if (INTEGER_PATTERN.matcher(rawValue).matches()) { | ||
| return Long.parseLong(rawValue); | ||
| } | ||
| if (DECIMAL_PATTERN.matcher(rawValue).matches()) { | ||
| return Double.parseDouble(rawValue); | ||
| } | ||
| return rawValue; | ||
| } | ||
|
|
||
| private static String parseStringValue(String rawValue) { | ||
| if (rawValue.length() < 2 || rawValue.charAt(rawValue.length() - 1) != '"') { | ||
| throw new IllegalArgumentException("invalid sf-string value"); | ||
| } | ||
|
|
||
| StringBuilder decoded = new StringBuilder(); | ||
| for (int i = 1; i < rawValue.length() - 1; i++) { | ||
| char current = rawValue.charAt(i); | ||
| if (current == '\\') { | ||
| if (i + 1 >= rawValue.length() - 1) { | ||
| throw new IllegalArgumentException("invalid sf-string escape"); | ||
| } | ||
| decoded.append(rawValue.charAt(++i)); | ||
| } else { | ||
| decoded.append(current); | ||
| } | ||
| } | ||
| return decoded.toString(); | ||
| } | ||
|
|
||
| private static List<String> splitListItems(String input) { | ||
| return splitOnDelimiter(input, ','); | ||
| } | ||
|
|
||
| private static List<String> splitParameters(String input) { | ||
| return splitOnDelimiter(input, ';'); | ||
| } | ||
|
|
||
| private static List<String> splitOnDelimiter(String input, char delimiter) { | ||
| List<String> parts = new ArrayList<>(); | ||
| StringBuilder current = new StringBuilder(); | ||
| boolean inQuotes = false; | ||
|
|
||
| for (int i = 0; i < input.length(); i++) { | ||
| char currentChar = input.charAt(i); | ||
| if (currentChar == '"') { | ||
| inQuotes = !inQuotes; | ||
| current.append(currentChar); | ||
| } else if (currentChar == delimiter && !inQuotes) { | ||
| addIfNotBlank(parts, current); | ||
| current = new StringBuilder(); | ||
| } else { | ||
| current.append(currentChar); | ||
| } | ||
| } | ||
|
|
||
| addIfNotBlank(parts, current); | ||
| return parts; | ||
| } | ||
|
|
||
| private static int indexOfParameterSeparator(String item) { | ||
| boolean inQuotes = false; | ||
| for (int i = 0; i < item.length(); i++) { | ||
| char current = item.charAt(i); | ||
| if (current == '"') { | ||
| inQuotes = !inQuotes; | ||
| } else if (current == ';' && !inQuotes) { | ||
| return i; | ||
| } | ||
| } | ||
| return -1; | ||
| } | ||
|
|
||
| private static int indexOfEquals(String parameter) { | ||
| boolean inQuotes = false; | ||
| for (int i = 0; i < parameter.length(); i++) { | ||
| char current = parameter.charAt(i); | ||
| if (current == '"') { | ||
| inQuotes = !inQuotes; | ||
| } else if (current == '=' && !inQuotes) { | ||
| return i; | ||
| } | ||
| } | ||
| return -1; | ||
| } | ||
|
coderabbitai[bot] marked this conversation as resolved.
|
||
|
|
||
| private static void addIfNotBlank(List<String> parts, StringBuilder current) { | ||
| if (current.length() == 0) { | ||
| return; | ||
| } | ||
| String value = current.toString().trim(); | ||
| if (!value.isEmpty()) { | ||
| parts.add(value); | ||
| } | ||
| } | ||
| } | ||
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