brianc · brianc · Mar 7, 2013 · Mar 7, 2013 · Mar 7, 2013 · Mar 7, 2013
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,6 @@
 language: node_js
 node_js:
   - 0.8
+  - 0.9
 before_script:
   - node script/create-test-tables.js pg://postgres@127.0.0.1:5432/postgres
diff --git a/lib/client.js b/lib/client.js
@@ -10,6 +10,8 @@ var Connection = require(__dirname + '/connection');
 var CopyFromStream = require(__dirname + '/copystream').CopyFromStream;
 var CopyToStream = require(__dirname + '/copystream').CopyToStream;
 
+var deprecate = require('deprecate');
+
 var Client = function(config) {
   EventEmitter.call(this);
 
@@ -256,11 +258,23 @@ Client.prototype.query = function(config, values, callback) {
 //prevents client from otherwise emitting 'drain' event until 'resumeDrain' is
 //called
 Client.prototype.pauseDrain = function() {
+  deprecate('Client.prototype.pauseDrain is deprecated and will be removed it v1.0.0 (very soon)',
+           'please see the following for more details:',
+           'https://github.com/brianc/node-postgres/wiki/pg',
+           'https://github.com/brianc/node-postgres/issues/227',
+           'https://github.com/brianc/node-postgres/pull/274',
+           'feel free to get in touch via github if you have questions');
   this._drainPaused = 1;
 };
 
 //resume raising 'drain' event
 Client.prototype.resumeDrain = function() {
+  deprecate('Client.prototype.resumeDrain is deprecated and will be removed it v1.0.0 (very soon)',
+           'please see the following for more details:',
+           'https://github.com/brianc/node-postgres/wiki/pg',
+           'https://github.com/brianc/node-postgres/issues/227',
+           'https://github.com/brianc/node-postgres/pull/274',
+           'feel free to get in touch via github if you have questions');
   if(this._drainPaused > 1) {
     this.emit('drain');
   }

diff --git a/lib/defaults.js b/lib/defaults.js
@@ -33,3 +33,12 @@ module.exports = {
   //pool log function / boolean
   poolLog: false
 };
+
+var deprecate = require('deprecate');
+//getter/setter to disable deprecation warnings
+module.exports.__defineGetter__("hideDeprecationWarnings", function() {
+  return deprecate.silent;
+});
+module.exports.__defineSetter__("hideDeprecationWarnings", function(val) {
+  deprecate.silence = val;
+});
diff --git a/lib/deprecate.js b/lib/deprecate.js
@@ -0,0 +1,25 @@
+var os = require('os');
+var defaults = require(__dirname + '/defaults');
+
+var hits = {
+};
+var deprecate = module.exports = function(methodName, message) {
+  if(defaults.hideDeprecationWarnings) return;
+  if(hits[deprecate.caller]) return;
+  hits[deprecate.caller] = true;
+  process.stderr.write(os.EOL);
+  process.stderr.write('\x1b[31;1m');
+  process.stderr.write('WARNING!!');
+  process.stderr.write(os.EOL);
+  process.stderr.write(methodName);
+  process.stderr.write(os.EOL);
+  for(var i = 1; i < arguments.length; i++) {
+    process.stderr.write(arguments[i]);
+    process.stderr.write(os.EOL);
+  }
+  process.stderr.write('\x1b[0m');
+  process.stderr.write(os.EOL);
+  process.stderr.write("You can silence these warnings with `require('pg').defaults.hideDeprecationWarnings = true`");
+  process.stderr.write(os.EOL);
+  process.stderr.write(os.EOL);
+};
diff --git a/lib/pool.js b/lib/pool.js
@@ -3,6 +3,8 @@ var EventEmitter = require('events').EventEmitter;
 var defaults = require(__dirname + '/defaults');
 var genericPool = require('generic-pool');
 
+var deprecate = require('deprecate');
+
 var pools = {
   //dictionary of all key:pool pairs
   all: {},
@@ -77,6 +79,14 @@ var errorMessage = [
 ].join(require('os').EOL);
 
 var oldConnect = function(pool, client, cb) {
+  deprecate('pg.connect(function(err, client) { ...}) is deprecated and will be removed it v1.0.0 (very soon)',
+            'instead, use pg.connect(function(err, client, done) { ... })',
+            'automatic releasing of clients back to the pool was a mistake and will be removed',
+           'please see the following for more details:',
+           'https://github.com/brianc/node-postgres/wiki/pg',
+           'https://github.com/brianc/node-postgres/issues/227',
+           'https://github.com/brianc/node-postgres/pull/274',
+           'feel free to get in touch via github if you have questions');
   var tid = setTimeout(function() {
     console.error(errorMessage);
   }, alarmDuration);

diff --git a/lib/types/binaryParsers.js b/lib/types/binaryParsers.js
@@ -1,3 +1,5 @@
+var deprecate = require('deprecate');
+
 var parseBits = function(data, bits, offset, invert, callback) {
   offset = offset || 0;
   invert = invert || false;
@@ -45,6 +47,12 @@ var parseBits = function(data, bits, offset, invert, callback) {
 };
 
 var parseFloatFromBits = function(data, precisionBits, exponentBits) {
+  deprecate('parsing and returning floats from PostgreSQL server is deprecated',
+           'JavaScript has a hard time with floats and there is precision loss which can cause',
+           'unexpected, hard to trace, potentially bad bugs in your program',
+           'for more information see the following:',
+           'https://github.com/brianc/node-postgres/pull/271',
+           'in node-postgres v1.0.0 all floats & decimals will be returned as strings');
   var bias = Math.pow(2, exponentBits - 1) - 1;
   var sign = parseBits(data, 1);
   var exponent = parseBits(data, exponentBits, 1);

diff --git a/lib/types/textParsers.js b/lib/types/textParsers.js
@@ -1,3 +1,5 @@
+var deprecate = require('deprecate');
+
 var arrayParser = require(__dirname + "/arrayParser.js");
 
 //parses PostgreSQL server formatted date strings into javascript date objects
@@ -76,6 +78,13 @@ var parseIntegerArray = function(val) {
 };
 
 var parseFloatArray = function(val) {
+  deprecate('parsing and returning floats from PostgreSQL server is deprecated',
+           'JavaScript has a hard time with floats and there is precision loss which can cause',
+           'unexpected, hard to trace, potentially bad bugs in your program',
+           'for more information see the following:',
+           'https://github.com/brianc/node-postgres/pull/271',
+           'in node-postgres v1.0.0 all floats & decimals will be returned as strings',
+           'feel free to get in touch via a github issue if you have any questions');
   if(!val) { return null; }
   var p = arrayParser.create(val, function(entry){
     if(entry !== null) {
@@ -162,24 +171,27 @@ var parseInteger = function(val) {
   return parseInt(val, 10);
 };
 
+var parseFloatAndWarn = function(val) {
+  deprecate('parsing and returning floats from PostgreSQL server is deprecated',
+           'JavaScript has a hard time with floats and there is precision loss which can cause',
+           'unexpected, hard to trace, potentially bad bugs in your program',
+           'for more information see the following:',
+           'https://github.com/brianc/node-postgres/pull/271',
+           'in node-postgres v1.0.0 all floats & decimals will be returned as strings');
+  return parseFloat(val);
+};
+
 var init = function(register) {
   register(20, parseInteger);
   register(21, parseInteger);
   register(23, parseInteger);
   register(26, parseInteger);
   //TODO remove for v1.0
-  register(1700, function(val){
-    if(val.length > maxLen) {
-      console.warn(
-        'WARNING: value %s is longer than max supported numeric value in ' +
-        'javascript. Possible data loss', val);
-    }
-    return parseFloat(val);
-  });
+  register(1700, parseFloatAndWarn);
   //TODO remove for v1.0
-  register(700, parseFloat);
+  register(700, parseFloatAndWarn);
   //TODO remove for v1.0
-  register(701, parseFloat);
+  register(701, parseFloatAndWarn);
   register(16, parseBool);
   register(1082, parseDate); // date
   register(1114, parseDate); // timestamp without timezone

diff --git a/package.json b/package.json
@@ -1,24 +1,35 @@
-{ "name": "pg",
+{
+  "name": "pg",
   "version": "0.13.3",
   "description": "PostgreSQL client - pure javascript & libpq with the same API",
-  "keywords" : ["postgres", "pg", "libpq", "postgre", "database", "rdbms"],
+  "keywords": [
+    "postgres",
+    "pg",
+    "libpq",
+    "postgre",
+    "database",
+    "rdbms"
+  ],
   "homepage": "http://github.com/brianc/node-postgres",
-  "repository" : {
-    "type" : "git",
-    "url" : "git://github.com/brianc/node-postgres.git"
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/brianc/node-postgres.git"
   },
-  "author" : "Brian Carlson <brian.m.carlson@gmail.com>",
-  "main" : "./lib",
-  "dependencies" : {
-    "generic-pool" : "2.0.2"
+  "author": "Brian Carlson <brian.m.carlson@gmail.com>",
+  "main": "./lib",
+  "dependencies": {
+    "generic-pool": "2.0.2",
+    "deprecate": "~0.1.0"
   },
-  "devDependencies" : {
-    "jshint" : "git://github.com/jshint/jshint.git"
+  "devDependencies": {
+    "jshint": "git://github.com/jshint/jshint.git"
   },
-  "scripts" : {
-    "test" : "make test-all connectionString=pg://postgres@localhost:5432/postgres",
+  "scripts": {
+    "test": "make test-all connectionString=pg://postgres@localhost:5432/postgres",
     "prepublish": "rm -r build || (exit 0)",
-    "install" : "node-gyp rebuild || (exit 0)"
+    "install": "node-gyp rebuild || (exit 0)"
   },
-  "engines" : { "node": ">= 0.8.0" }
+  "engines": {
+    "node": ">= 0.8.0"
+  }
 }
diff --git a/src/binding.cc b/src/binding.cc
@@ -249,13 +249,17 @@ class Connection : public ObjectWrap {
   bool ioInitialized_;
   bool copyOutMode_;
   bool copyInMode_;
+  bool reading_;
+  bool writing_;
   Connection () : ObjectWrap ()
   {
     connection_ = NULL;
     connecting_ = false;
     ioInitialized_ = false;
     copyOutMode_ = false;
     copyInMode_ = false;
+    reading_ = false;
+    writing_ = false;
     TRACE("Initializing ev watchers");
     read_watcher_.data = this;
     write_watcher_.data = this;
@@ -304,20 +308,23 @@ class Connection : public ObjectWrap {
 
   int Send(const char *queryText)
   {
+    TRACE("js::Send")
     int rv = PQsendQuery(connection_, queryText);
     StartWrite();
     return rv;
   }
 
   int SendQueryParams(const char *command, const int nParams, const char * const *paramValues)
   {
+    TRACE("js::SendQueryParams")
     int rv = PQsendQueryParams(connection_, command, nParams, NULL, paramValues, NULL, NULL, 0);
     StartWrite();
     return rv;
   }
 
   int SendPrepare(const char *name, const char *command, const int nParams)
   {
+    TRACE("js::SendPrepare")
     int rv = PQsendPrepare(connection_, name, command, nParams, NULL);
     StartWrite();
     return rv;
@@ -430,7 +437,7 @@ class Connection : public ObjectWrap {
       if(PQconsumeInput(connection_) == 0) {
         End();
         EmitLastError();
-        LOG("Something happened, consume input is 0");
+        //LOG("Something happened, consume input is 0");
         return;
       }
 
@@ -476,7 +483,8 @@ class Connection : public ObjectWrap {
     if(revents & UV_WRITABLE) {
       TRACE("revents & UV_WRITABLE");
       if (PQflush(connection_) == 0) {
-        StopWrite();
+        //nothing left to write, poll the socket for more to read
+        StartRead();
       }
     }
   }
@@ -669,12 +677,10 @@ class Connection : public ObjectWrap {
     switch(status) {
       case PGRES_POLLING_READING:
         TRACE("Polled: PGRES_POLLING_READING");
-        StopWrite();
         StartRead();
         break;
       case PGRES_POLLING_WRITING:
         TRACE("Polled: PGRES_POLLING_WRITING");
-        StopRead();
         StartWrite();
         break;
       case PGRES_POLLING_FAILED:
@@ -712,30 +718,42 @@ class Connection : public ObjectWrap {
 
   void StopWrite()
   {
-    TRACE("Stoping write watcher");
+    TRACE("write STOP");
     if(ioInitialized_) {
       uv_poll_stop(&write_watcher_);
+      writing_ = false;
     }
   }
 
   void StartWrite()
   {
-    TRACE("Starting write watcher");
+    TRACE("write START");
+    if(reading_) {
+      TRACE("stop READ to start WRITE");
+      StopRead();
+    }
     uv_poll_start(&write_watcher_, UV_WRITABLE, io_event);
+    writing_ = true;
   }
 
   void StopRead()
   {
-    TRACE("Stoping read watcher");
+    TRACE("read STOP");
     if(ioInitialized_) {
       uv_poll_stop(&read_watcher_);
+      reading_ = false;
     }
   }
 
   void StartRead()
   {
-    TRACE("Starting read watcher");
+    TRACE("read START");
+    if(writing_) {
+      TRACE("stop WRITE to start READ");
+      StopWrite();
+    }
     uv_poll_start(&read_watcher_, UV_READABLE, io_event);
+    reading_ = true;
   }
   //Converts a v8 array to an array of cstrings
   //the result char** array must be free() when it is no longer needed

diff --git a/test/test-helper.js b/test/test-helper.js
@@ -7,6 +7,8 @@ var BufferList = require(__dirname+'/buffer-list')
 
 var Connection = require(__dirname + '/../lib/connection');
 
+require(__dirname + '/../lib').defaults.hideDeprecationWarnings = true;
+
 Client = require(__dirname + '/../lib').Client;
 
 process.on('uncaughtException', function(d) {