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    trycatchpublic

    trycatch

    Build Status A domain-based asynchronous try/catch with (optional) long stack traces for node.js optimized for V8.

    WARNING: trycatch replaces the built-in global Error object.

    Install

    npm install trycatch
    

    Use

    var trycatch = require('trycatch')
    trycatch(function() {
      // do something error-prone
    }, function(err) {
      console.log(err.stack);
    })

    Returning 500s on Server Request

    http.createServer(function(req, res) {
      trycatch(function() {
        setTimeout(function() {
          throw new Error('Baloney!');
        }, 1000);
      }, function(err) {
        res.writeHead(500);
        res.end(err.stack);
      });
    }).listen(8000);

    Visit http://localhost:8000 and get your 500.

    Options

    Optional Long-Stack-Traces:

    // Because trycatch shims all native I/O calls,
    // it must be required & configured with 'long-stack-traces' before any other modules.
    var trycatch = require('trycatch')
    trycatch.configure({'long-stack-traces': true})
    trycatch(fnTry, fnCatch)

    Colors:

    var trycatch = require('trycatch')
    trycatch.configure({
      colors: {
        // 'none' or falsy values will omit
        'node': 'none',
        'node_modules': false,
        'default': 'yellow'
      }
    })
    trycatch(fnTry, fnCatch)

    Advanced Formatting:

    var trycatch = require('trycatch')
    trycatch.configure({
      format: function(line) {
        // Alter final output (falsy values will omit)
        return line
      }
    })
    trycatch(fnTry, fnCatch)

    Basic Example

    var trycatch = require("trycatch"),
      _ = require('underscore')._
     
      trycatch(function() {
      _.map(['Error 1', 'Error 2'], function foo(v) {
        setTimeout(function() {
          throw new Error(v)
        }, 10)
      })
    }, function(err) {
      console.log("Async error caught!\n", err.stack);
    });

    Output

    Advanced Examples

    See the /test and examples directories for more use cases.

    uncaughtApplicationException

    trycatch effectively wraps all application callbacks in try/catch blocks, preventing an exception in your application code from causing code in core to not execute. Effectively, this means that excpeitons originating in application code that normally would be passed as uncaughtException, can instead be handled via uncaughtApplicationException without requiring a restart:

    process.on('uncaughtApplicationException', (err) => console.log(err.stack))
     
    process.on('uncaughtException', (err) => {
      console.log(err.stack)
      // We are in an undefined state and need to restart
      handleSoftShutodwn()
    })

    install

    npm i trycatch

    Downloadsweekly downloads

    1,468

    version

    1.5.21

    license

    none

    repository

    githubgithub

    last publish

    collaborators

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