ionic-logging-service
Version:
Logging functionalities for apps built with Ionic framework
191 lines • 19.5 kB
JavaScript
import * as log4javascript from "log4javascript";
import { LogLevelConverter } from "./log-level.converter";
/**
* Logger for writing log messages.
*/
export class Logger {
/**
* Creates a new instance of a logger.
*/
constructor(logger) {
if (typeof logger === "undefined") {
this.logger = log4javascript.getRootLogger();
}
else if (typeof logger === "string") {
this.logger = log4javascript.getLogger(logger);
}
else {
this.logger = logger;
}
}
/**
* Get the log level.
*/
getLogLevel() {
return LogLevelConverter.levelFromLog4Javascript(this.logger.getLevel());
}
/**
* Set the log level.
*
* @param level the new log level
*/
setLogLevel(level) {
this.logger.setLevel(LogLevelConverter.levelToLog4Javascript(level));
}
/**
* Logs a message at level TRACE.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
trace(methodName, ...params) {
if (this.logger.isTraceEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.trace.apply(this.logger, args);
}
}
/**
* Logs a message at level DEBUG.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
debug(methodName, ...params) {
if (this.logger.isDebugEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.debug.apply(this.logger, args);
}
}
/**
* Logs a message at level INFO.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
info(methodName, ...params) {
if (this.logger.isInfoEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.info.apply(this.logger, args);
}
}
/**
* Logs a message at level WARN.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
warn(methodName, ...params) {
if (this.logger.isWarnEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.warn.apply(this.logger, args);
}
}
/**
* Logs a message at level ERROR.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
error(methodName, ...params) {
if (this.logger.isErrorEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.error.apply(this.logger, args);
}
}
/**
* Logs a message at level FATAL.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
fatal(methodName, ...params) {
if (this.logger.isFatalEnabled()) {
const args = [methodName];
for (const param of params) {
args.push(this.formatArgument(param));
}
this.logger.fatal.apply(this.logger, args);
}
}
/**
* Logs the entry into a method.
* The method name will be logged at level INFO, the parameters at level DEBUG.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
entry(methodName, ...params) {
if (this.logger.isInfoEnabled()) {
const args = [methodName, "entry"];
if (this.logger.isDebugEnabled()) {
for (const param of params) {
args.push(this.formatArgument(param));
}
}
this.logger.info.apply(this.logger, args);
}
}
/**
* Logs the exit of a method.
* The method name will be logged at level INFO, the parameters at level DEBUG.
*
* @param methodName name of the method
* @param params optional parameters to be logged; objects will be formatted as JSON
*/
exit(methodName, ...params) {
if (this.logger.isInfoEnabled()) {
const args = [methodName, "exit"];
if (this.logger.isDebugEnabled()) {
for (const param of params) {
args.push(this.formatArgument(param));
}
}
this.logger.info.apply(this.logger, args);
}
}
/**
* Formats the given argument.
*/
formatArgument(arg) {
if (typeof arg === "string") {
return arg;
}
else if (typeof arg === "number") {
return arg.toString();
}
else if (arg instanceof Error) {
// JSON.stringify() returns here "{ }"
return arg.toString();
}
else {
try {
return JSON.stringify(arg);
}
catch (e) {
return e.message;
}
}
}
/**
* Returns the internal Logger (for unit tests only).
*/
getInternalLogger() {
return this.logger;
}
}
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* as log4javascript from \"log4javascript\";\n\nimport { LogLevelConverter } from \"./log-level.converter\";\nimport { LogLevel } from \"./log-level.model\";\n\n/**\n * Logger for writing log messages.\n */\nexport class Logger {\n\n\tprivate logger: log4javascript.Logger;\n\n\t/**\n\t * Creates a new instance of a logger.\n\t */\n\tconstructor(logger?: string | any) {\n\t\tif (typeof logger === \"undefined\") {\n\t\t\tthis.logger = log4javascript.getRootLogger();\n\t\t} else if (typeof logger === \"string\") {\n\t\t\tthis.logger = log4javascript.getLogger(logger);\n\t\t} else {\n\t\t\tthis.logger = logger;\n\t\t}\n\t}\n\n\t/**\n\t * Get the log level.\n\t */\n\tpublic getLogLevel(): LogLevel {\n\t\treturn LogLevelConverter.levelFromLog4Javascript(this.logger.getLevel());\n\t}\n\n\t/**\n\t * Set the log level.\n\t *\n\t * @param level the new log level\n\t */\n\tpublic setLogLevel(level: LogLevel): void {\n\t\tthis.logger.setLevel(LogLevelConverter.levelToLog4Javascript(level));\n\t}\n\n\t/**\n\t * Logs a message at level TRACE.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic trace(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isTraceEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.trace.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs a message at level DEBUG.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic debug(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isDebugEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.debug.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs a message at level INFO.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic info(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isInfoEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.info.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs a message at level WARN.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic warn(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isWarnEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.warn.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs a message at level ERROR.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic error(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isErrorEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.error.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs a message at level FATAL.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic fatal(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isFatalEnabled()) {\n\t\t\tconst args = [methodName];\n\t\t\tfor (const param of params) {\n\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t}\n\t\t\tthis.logger.fatal.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs the entry into a method.\n\t * The method name will be logged at level INFO, the parameters at level DEBUG.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic entry(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isInfoEnabled()) {\n\t\t\tconst args = [methodName, \"entry\"];\n\t\t\tif (this.logger.isDebugEnabled()) {\n\t\t\t\tfor (const param of params) {\n\t\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t\t}\n\t\t\t}\n\t\t\tthis.logger.info.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Logs the exit of a method.\n\t * The method name will be logged at level INFO, the parameters at level DEBUG.\n\t *\n\t * @param methodName name of the method\n\t * @param params optional parameters to be logged; objects will be formatted as JSON\n\t */\n\tpublic exit(methodName: string, ...params: any[]): void {\n\t\tif (this.logger.isInfoEnabled()) {\n\t\t\tconst args = [methodName, \"exit\"];\n\t\t\tif (this.logger.isDebugEnabled()) {\n\t\t\t\tfor (const param of params) {\n\t\t\t\t\targs.push(this.formatArgument(param));\n\t\t\t\t}\n\t\t\t}\n\t\t\tthis.logger.info.apply(this.logger, args);\n\t\t}\n\t}\n\n\t/**\n\t * Formats the given argument.\n\t */\n\tpublic formatArgument(arg: any): string {\n\t\tif (typeof arg === \"string\") {\n\t\t\treturn arg;\n\t\t} else if (typeof arg === \"number\") {\n\t\t\treturn arg.toString();\n\t\t} else if (arg instanceof Error) {\n\t\t\t// JSON.stringify() returns here \"{ }\"\n\t\t\treturn arg.toString();\n\t\t} else {\n\t\t\ttry {\n\t\t\t\treturn JSON.stringify(arg);\n\t\t\t} catch (e) {\n\t\t\t\treturn e.message;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns the internal Logger (for unit tests only).\n\t */\n\tpublic getInternalLogger(): log4javascript.Logger {\n\t\treturn this.logger;\n\t}\n}\n"]}