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<?php
namespace Elastic\Apm;
/**
* Class ElasticApm is a facade (as in Facade design pattern) to the rest of Elastic APM public API.
*/
final class ElasticApm
{
public const VERSION = '1.3.1';
private function __construct() {}
/**
* Begins a new transaction and sets it as the current transaction.
*
* @param string $name New transaction's name
* @param string $type New transaction's type
* @param float|null $timestamp Start time of the new transaction
* @param string|null $serializedDistTracingData - DEPRECATED since version 1.3 -
* use newTransaction()->distributedTracingHeaderExtractor() instead
*
* @return TransactionInterface New transaction
*
* @see TransactionInterface::setName() For the description.
* @see TransactionInterface::setType() For the description.
* @see TransactionInterface::getTimestamp() For the description.
*/
public static function beginCurrentTransaction(
string $name,
string $type,
?float $timestamp = null,
?string $serializedDistTracingData = null
): TransactionInterface {}
/**
* Begins a new transaction, sets as the current transaction,
* runs the provided callback as the new transaction and automatically ends the new transaction.
*
* @param string $name New transaction's name
* @param string $type New transaction's type
* @param \Closure $callback Callback to execute as the new transaction
* @param float|null $timestamp Start time of the new transaction
* @param string|null $serializedDistTracingData - DEPRECATED since version 1.3 -
* use newTransaction()->distributedTracingHeaderExtractor() instead
*
* @return mixed The return value of $callback
*
* @see TransactionInterface::setName() For the description.
* @see TransactionInterface::setType() For the description.
* @see TransactionInterface::getTimestamp() For the description.
*/
public static function captureCurrentTransaction(
string $name,
string $type,
\Closure $callback,
?float $timestamp = null,
?string $serializedDistTracingData = null
) {}
/**
* Returns the current transaction.
*
* @return TransactionInterface The current transaction
*/
public static function getCurrentTransaction(): TransactionInterface {}
/**
* If there is the current span then it returns the current span.
* Otherwise if there is the current transaction then it returns the current transaction.
* Otherwise it returns the noop execution segment.
*
* @return ExecutionSegmentInterface The current execution segment
*/
public static function getCurrentExecutionSegment(): ExecutionSegmentInterface {}
/**
* Begins a new transaction.
*
* @param string $name New transaction's name
* @param string $type New transaction's type
* @param float|null $timestamp Start time of the new transaction
* @param string|null $serializedDistTracingData - DEPRECATED since version 1.3 -
* use newTransaction()->distributedTracingHeaderExtractor() instead
*
* @return TransactionInterface New transaction
*
* @see TransactionInterface::setName() For the description.
* @see TransactionInterface::setType() For the description.
* @see TransactionInterface::getTimestamp() For the description.
*/
public static function beginTransaction(
string $name,
string $type,
?float $timestamp = null,
?string $serializedDistTracingData = null
): TransactionInterface {}
/**
* Begins a new transaction,
* runs the provided callback as the new transaction and automatically ends the new transaction.
*
* @param string $name New transaction's name
* @param string $type New transaction's type
* @param \Closure $callback Callback to execute as the new transaction
* @param float|null $timestamp Start time of the new transaction
* @param string|null $serializedDistTracingData - DEPRECATED since version 1.3 -
* use newTransaction()->distributedTracingHeaderExtractor() instead
*
* @return mixed The return value of $callback
*
* @see TransactionInterface::setName() For the description.
* @see TransactionInterface::setType() For the description.
* @see TransactionInterface::getTimestamp() For the description.
*/
public static function captureTransaction(
string $name,
string $type,
\Closure $callback,
?float $timestamp = null,
?string $serializedDistTracingData = null
) {}
/**
* Advanced API to begin a new transaction
*
* @param string $name New transaction's name
* @param string $type New transaction's type
*
* @return TransactionBuilderInterface New transaction builder
*
* @see TransactionInterface::setName() For the description.
* @see TransactionInterface::setType() For the description.
*/
public static function newTransaction(string $name, string $type): TransactionBuilderInterface {}
/**
* Creates an error based on the given Throwable instance
* with the current execution segment (if there is one) as the parent.
*
* @param \Throwable $throwable
*
* @return string|null ID of the reported error event or null if no event was reported
* (for example, because recording is disabled)
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json
*/
public static function createErrorFromThrowable(\Throwable $throwable): ?string {}
/**
* Creates an error based on the given data
* with the current execution segment (if there is one) as the parent.
*
* @param CustomErrorData $customErrorData
*
* @return string|null ID of the reported error event or null if no event was reported
* (for example, because recording is disabled)
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json
*/
public static function createCustomError(CustomErrorData $customErrorData): ?string {}
/**
* Pauses recording
*/
public static function pauseRecording(): void {}
/**
* Resumes recording
*/
public static function resumeRecording(): void {}
/**
* @deprecated Deprecated since version 1.3 - use injectDistributedTracingHeaders() instead
* @see injectDistributedTracingHeaders() Use it instead of this method
*
* Returns distributed tracing data for the current span/transaction
*/
public static function getSerializedCurrentDistributedTracingData(): string {}
}
/**
* Class to gather optional parameters to start a new transaction
*
* @see ElasticApm::beginCurrentTransaction()
* @see ElasticApm::captureCurrentTransaction()
*/
interface TransactionBuilderInterface
{
/**
* New transaction will be set as the current one
*
* @return TransactionBuilderInterface
*/
public function asCurrent(): self;
/**
* Set start time of the new transaction
*
* @param float $timestamp
*
* @return TransactionBuilderInterface
*/
public function timestamp(float $timestamp): self;
/**
* @param \Closure $headerExtractor
*
* @return TransactionBuilderInterface
*/
public function distributedTracingHeaderExtractor(\Closure $headerExtractor): self;
/**
* Begins a new transaction.
*
* @return TransactionInterface New transaction
*/
public function begin(): TransactionInterface;
/**
* Begins a new transaction,
* runs the provided callback as the new transaction and automatically ends the new transaction.
*
* @param \Closure $callback
*
* @return mixed The return value of $callback
*/
public function capture(\Closure $callback);
}
interface TransactionInterface extends ExecutionSegmentInterface
{
/**
* Transactions that are 'sampled' will include all available information
* Transactions that are not sampled will not have 'spans' or 'context'.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L72
*/
public function isSampled(): bool;
/**
* Hex encoded 64 random bits ID of the parent transaction or span.
* Only a root transaction of a trace does not have a parent ID, otherwise it needs to be set.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L19
*/
public function getParentId(): ?string;
/**
* Begins a new span with the current execution segment
* as the new span's parent and sets as the new span as the current span for this transaction.
* The current execution segment is the current span if there is one or this transaction itself otherwise.
*
* @param string $name New span's name.
* @param string $type New span's type
* @param string|null $subtype New span's subtype
* @param string|null $action New span's action
* @param float|null $timestamp Start time of the new span
*
* @see SpanInterface::setName() For the description.
* @see SpanInterface::setType() For the description.
* @see SpanInterface::setSubtype() For the description.
* @see SpanInterface::setAction() For the description.
* @see SpanInterface::getTimestamp() For the description.
*
* @return SpanInterface New span
*/
public function beginCurrentSpan(
string $name,
string $type,
?string $subtype = null,
?string $action = null,
?float $timestamp = null
): SpanInterface;
/**
* Begins a new span with the current execution segment as the new span's parent and
* sets the new span as the current span for this transaction.
* The current execution segment is the current span if there is one or this transaction itself otherwise.
*
* @param string $name New span's name
* @param string $type New span's type
* @param \Closure $callback Callback to execute as the new span
* @param string|null $subtype New span's subtype
* @param string|null $action New span's action
* @param float|null $timestamp Start time of the new span
*
* @see SpanInterface::setName() For the description.
* @see SpanInterface::setType() For the description.
* @see SpanInterface::setSubtype() For the description.
* @see SpanInterface::setAction() For the description.
* @see SpanInterface::getTimestamp() For the description.
*
* @return mixed The return value of $callback
*/
public function captureCurrentSpan(
string $name,
string $type,
\Closure $callback,
?string $subtype = null,
?string $action = null,
?float $timestamp = null
);
/**
* Returns the current span.
*
* @return SpanInterface The current span
*/
public function getCurrentSpan(): SpanInterface;
/**
* Returns context (context allows to set labels, etc.)
*/
public function context(): TransactionContextInterface;
/**
* The result of the transaction.
* For HTTP-related transactions, this should be the status code formatted like 'HTTP 2xx'.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L52
*
* @param string|null $result
*
* @return void
*/
public function setResult(?string $result): void;
/**
* @see setResult() For the description
*/
public function getResult(): ?string;
/**
* If the transaction does not have a parent ID yet,
* calling this method generates a new ID,
* sets it as the parent ID of this transaction, and returns it as a string.
*
* @return string
*/
public function ensureParentId(): string;
}
interface SpanInterface extends ExecutionSegmentInterface
{
/**
* Hex encoded 64 random bits ID of the correlated transaction.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L14
*/
public function getTransactionId(): string;
/**
* Hex encoded 64 random bits ID of the parent.
* If this span is the root span of the correlated transaction the its parent is the correlated transaction
* otherwise its parent is the parent span.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L24
*/
public function getParentId(): string;
/**
* The specific kind of event within the sub-type represented by the span
* e.g., 'query' for type/sub-type 'db'/'mysql', 'connect' for type/sub-type 'db'/'cassandra'
*
* The length of this string is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L38
*
* @param string|null $action
*
* @return void
*/
public function setAction(?string $action): void;
/**
* A further sub-division of the type
* e.g., 'mysql', 'postgresql' or 'elasticsearch' for type 'db', 'http' for type 'external', etc.
*
* The length of this string is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L33
*
* @param string|null $subtype
*/
public function setSubtype(?string $subtype): void;
/**
* Returns context (context allows to set labels, etc.)
*/
public function context(): SpanContextInterface;
/**
* Extended version of ExecutionSegmentInterface::end()
*
* @param int $numberOfStackFramesToSkip Number of stack frames to skip when capturing stack trace.
* @param float|null $duration In milliseconds with 3 decimal points.
*
* @see ExecutionSegmentInterface::end() For the description
*/
public function endSpanEx(int $numberOfStackFramesToSkip, ?float $duration = null): void;
}
interface SpanContextInterface extends ExecutionSegmentContextInterface
{
/**
* Returns an object containing contextual data for database spans
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L47
*/
public function db(): SpanContextDbInterface;
/**
* Returns an object containing contextual data of the related http request
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L69
*/
public function http(): SpanContextHttpInterface;
/**
* Returns an object containing contextual data about the destination for spans
*
* @link https://github.com/elastic/apm-server/blob/7.6/docs/spec/spans/span.json#L44
*/
public function destination(): SpanContextDestinationInterface;
}
interface SpanContextDbInterface
{
/**
* A database statement (e.g. query) for the given database type
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L55
*
* @param string|null $statement
*
* @return void
*/
public function setStatement(?string $statement): void;
}
interface SpanContextHttpInterface
{
/**
* The raw url of the correlating http request
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L73
*
* @param string|null $url
*
* @return void
*/
public function setUrl(?string $url): void;
/**
* The status code of the http request
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L77
*
* @param int|null $statusCode
*
* @return void
*/
public function setStatusCode(?int $statusCode): void;
/**
* The method of the http request
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L81
*
* @param string|null $method
*
* @return void
*/
public function setMethod(?string $method): void;
}
/**
* An object containing contextual data about the destination for spans
*
* @link https://github.com/elastic/apm-server/blob/7.6/docs/spec/spans/span.json#L44
*/
interface SpanContextDestinationInterface
{
/**
* Sets destination service context
*
* @link https://github.com/elastic/apm-server/blob/v7.11.0/docs/spec/v2/span.json#L106
*
* @param string $name
* @param string $resource
* @param string $type
*/
public function setService(string $name, string $resource, string $type): void;
}
/**
* This interface has functionality shared between Transaction and Span.
*/
interface ExecutionSegmentInterface
{
/**
* Hex encoded 64 random bits (== 8 bytes == 16 hex digits) ID.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L9
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L9
*/
public function getId(): string;
/**
* Hex encoded 128 random bits (== 16 bytes == 32 hex digits) ID of the correlated trace.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L14
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L19
*/
public function getTraceId(): string;
/**
* Recorded time of the event.
* For events that have non-zero duration this time corresponds to the start of the event.
* UTC based and in microseconds since Unix epoch.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L6
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L6
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/timestamp_epoch.json#L7
*/
public function getTimestamp(): float;
/**
* Begins a new span with this execution segment as the new span's parent.
*
* @param string $name New span's name
* @param string $type New span's type
* @param string|null $subtype New span's subtype
* @param string|null $action New span's action
* @param float|null $timestamp Start time of the new span
*
* @see SpanInterface::setName() For the description.
* @see SpanInterface::setType() For the description.
* @see SpanInterface::setSubtype() For the description.
* @see SpanInterface::setAction() For the description.
* @see SpanInterface::setTimestamp() For the description.
*
* @return SpanInterface New span
*/
public function beginChildSpan(
string $name,
string $type,
?string $subtype = null,
?string $action = null,
?float $timestamp = null
): SpanInterface;
/**
* Begins a new span with this execution segment as the new span's parent,
* runs the provided callback as the new span and automatically ends the new span.
*
* @param string $name New span's name
* @param string $type New span's type
* @param \Closure $callback Callback to execute as the new span
* @param string|null $subtype New span's subtype
* @param string|null $action New span's action
* @param float|null $timestamp Start time of the new span
*
* @see SpanInterface::setName() For the description.
* @see SpanInterface::setType() For the description.
* @see SpanInterface::setSubtype() For the description.
* @see SpanInterface::setAction() For the description.
* @see SpanInterface::setTimestamp() For the description.
*
* @return mixed The return value of $callback
*/
public function captureChildSpan(
string $name,
string $type,
\Closure $callback,
?string $subtype = null,
?string $action = null,
?float $timestamp = null
);
/**
* - For transactions:
* The name of this transaction.
* Generic designation of a transaction in the scope of a single service (eg: 'GET /users/:id').
*
* - For spans:
* Generic designation of a span in the scope of a transaction.
*
* The length of this string is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L47
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L136
*
* @param string $name
*/
public function setName(string $name): void;
/**
* Type is a keyword of specific relevance in the service's domain
* e.g.,
* - For transaction: 'db', 'external' for a span and 'request', 'backgroundjob' for a transaction, etc.
* - For span: 'db.postgresql.query', 'template.erb', etc.
*
* The length of this string is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L57
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L149
*
* @param string $type
*/
public function setType(string $type): void;
/**
* @deprecated Deprecated since version 1.3 - use injectDistributedTracingHeaders() instead
* @see injectDistributedTracingHeaders() Use it instead of this method
*
* Returns distributed tracing data
*/
public function getDistributedTracingData(): ?DistributedTracingData;
/**
* Returns distributed tracing data for the current span/transaction
*
* $headerInjector is callback to inject headers with signature
*
* (string $headerName, string $headerValue): void
*
* @param \Closure $headerInjector Callback that actually injects header(s) for the underlying transport
*/
public function injectDistributedTracingHeaders(\Closure $headerInjector): void;
/**
* Sets the end timestamp and finalizes this object's state.
*
* If any mutating method (for example any `set...` method is a mutating method)
* is called on a instance which has already then a warning is logged.
* For example, end() is a mutating method as well.
*
* @param float|null $duration In milliseconds with 3 decimal points.
*/
public function end(?float $duration = null): void;
/**
* Returns true if this execution segment has already ended.
*/
public function hasEnded(): bool;
/**
* Creates an error based on the given Throwable instance with this execution segment as the parent.
*
* @param \Throwable $throwable
*
* @return string|null ID of the reported error event or null if no event was reported
* (for example, because recording is disabled)
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json
*/
public function createErrorFromThrowable(\Throwable $throwable): ?string;
/**
* Creates an error based on the given Throwable instance with this execution segment as the parent.
*
* @param CustomErrorData $customErrorData
*
* @return string|null ID of the reported error event or null if no event was reported
* (for example, because recording is disabled)
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json
*/
public function createCustomError(CustomErrorData $customErrorData): ?string;
/**
* The outcome of the transaction/span: success, failure, or unknown.
* Outcome may be one of a limited set of permitted values
* describing the success or failure of the transaction/span.
* This field can be used for calculating error rates for incoming/outgoing requests.
*
* @link https://github.com/elastic/apm-server/blob/v7.10.0/docs/spec/transactions/transaction.json#L59
* @link https://github.com/elastic/apm-server/blob/v7.10.0/docs/spec/spans/span.json#L54
* @link https://github.com/elastic/apm-server/blob/v7.10.0/docs/spec/outcome.json
*
* @param string|null $outcome
*
* @return void
*/
public function setOutcome(?string $outcome): void;
/**
* @see setOutcome() For the description
*/
public function getOutcome(): ?string;
/**
* Returns true if this execution segment is a no-op (for example when recording is disabled).
*/
public function isNoop(): bool;
/**
* Discards this execution segment.
*/
public function discard(): void;
}
final class DistributedTracingData
{
/** @var string */
public $traceId;
/** @var string */
public $parentId;
/** @var bool */
public $isSampled;
/**
* @deprecated Deprecated since version 1.3 - use injectHeaders() instead
* @see injectHeaders() Use it instead of this method
*
* Returns distributed tracing data for the current span/transaction
*/
public function serializeToString(): string {}
/**
* Gets distributed tracing data for the current span/transaction
*
* $headerInjector is callback to inject headers with signature
*
* (string $headerName, string $headerValue): void
*
* @param \Closure $headerInjector Callback that actually injects header(s) for the underlying transport
*/
public function injectHeaders(\Closure $headerInjector): void {}
}
/**
* Data to create custom error event
*
* @see ElasticApm::createCustomError
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json#L53
*
* Code in this file is part of implementation internals and thus it is not covered by the backward compatibility.
*/
class CustomErrorData
{
/**
* @var int|string|null
*
* The error code set when the error happened, e.g. database error code
*
* The length of a string value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json#L56
*/
public $code = null;
/**
* @var string|null
*
* The original error message
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json#L61
*/
public $message = null;
/**
* @var string|null
*
* Describes the exception type's module namespace
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json#L65
*/
public $module = null;
/**
* @var string|null
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/errors/error.json#L80
*/
public $type = null;
}
interface TransactionContextInterface extends ExecutionSegmentContextInterface
{
/**
* Returns an object that can be used to collect information about HTTP request
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/context.json#L43
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json
*/
public function request(): TransactionContextRequestInterface;
}
/**
* This interface has functionality shared between Transaction and Span contexts'.
*/
interface ExecutionSegmentContextInterface
{
/**
* @param string $key
* @param string|bool|int|float|null $value
*
* Labels is a flat mapping of user-defined labels with string keys and null, string, boolean or number values.
*
* The length of a key and a string value is limited to 1024.
*
* @return void
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/transactions/transaction.json#L40
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/context.json#L46
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/spans/span.json#L88
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/tags.json
*/
public function setLabel(string $key, $value): void;
}
interface TransactionContextRequestInterface
{
/**
* HTTP method
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L33
*
* @param string $method
*
* @return void
*/
public function setMethod(string $method): void;
/**
* Returns an object that can be used to collect information about HTTP request's URL
*
* @link https://github.com/elastic/apm-server/blob/7.0/docs/spec/request.json#L50
*/
public function url(): TransactionContextRequestUrlInterface;
}
interface TransactionContextRequestUrlInterface
{
/**
* The domain of the request, e.g. 'example.com'
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L69
*
* @param ?string $domain
*
* @return void
*/
public function setDomain(?string $domain): void;
/**
* The full, possibly agent-assembled URL of the request
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L64
*
* @param ?string $full
*
* @return void
*/
public function setFull(?string $full): void;
/**
* The raw, unparsed URL of the HTTP request line, e.g https://example.com:443/search?q=elasticsearch.
* This URL may be absolute or relative.
* For more details, see https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L54
*
* @param ?string $original
*
* @return void
*/
public function setOriginal(?string $original): void;
/**
* The path of the request, e.g. '/search'
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L79
*
* @param ?string $path
*
* @return void
*/
public function setPath(?string $path): void;
/**
* The port of the request, e.g. 443
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L74
*
* @param ?int $port
*
* @return void
*/
public function setPort(?int $port): void;
/**
* The protocol of the request, e.g. 'http'
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L59
*
* @param ?string $protocol
*
* @return void
*/
public function setProtocol(?string $protocol): void;
/**
* Sets the query string information of the request.
* It is expected to have values delimited by ampersands.
*
* The length of a value is limited to 1024.
*
* @link https://github.com/elastic/apm-server/blob/v7.0.0/docs/spec/request.json#L84
*
* @param ?string $query
*
* @return void
*/
public function setQuery(?string $query): void;
}