basic future tests

[scpubgit/TenDotTcl.git] / ten / ten.tcl

diff --git a/ten/ten.tcl b/ten/ten.tcl
index 184b161..15be14d 100644 (file)
--- a/ten/ten.tcl
+++ b/ten/ten.tcl
@@ -10,7 +10,7 @@ snit::type ten::connector::perl {
 
   method connect {} {
     set conn_fh [open {|object-remote-node} r+]
-    set firstline [gets conn_fh]
+    set firstline [gets $conn_fh]
     switch $firstline {
       Shere {}
       default { error "Expected Shere, got $firstline" }
@@ -24,7 +24,125 @@ snit::type ten::connector::perl {
 
     return $conn
   }
-} 
+}
+
+snit::type ten::connection {
+
+  option -send_to_fh
+  option -read_channel
+
+  constructor {args} {
+    $self configurelist $args
+    fconfigure $options(-send_to_fh) -buffering none
+    $options(-read_channel) configurelist [list \
+      -on_line_call [ mymethod Receive ] \
+      -on_close_call [ mymethod ChannelClosed ] \
+    ]
+  }
+
+  method Receive {$line} {
+    puts $line
+  }
+
+  method ChannelClosed {} {
+    error "Fail"
+  }
+
+  method send {message_type args} {
+    set future [ten::future %AUTO%]
+    set call_args [concat $message_type $future $args] 
+  }
+}
+
+snit::type ten::future {
+
+  variable callbacks
+  variable is_ready 0
+  variable result ""
+  variable failure ""
+  
+  method done {args} {
+    if [$self is_ready] {
+      error "Future $self already completed"
+    }
+    set result $args
+    $self MarkReady
+  }
+
+  method fail {args} {
+    if [$self is_ready] {
+      error "Future $self already completed"
+    }
+    set failure $args
+    $self MarkReady
+  }
+
+  method on_ready {cb_code} {
+    lappend callbacks [list ready $cb_code]
+  }
+
+  method on_done {cb_code} {
+    lappend callbacks [list done $cb_code]
+  }
+
+  method on_fail {cb_code} {
+    lappend callbacks [list fail $cb_code]
+  }
+
+  method MarkReady {} {
+    set is_ready 1
+    foreach cb $callbacks {
+      set cb_type [lindex $cb 0]
+      set cb_code [lindex $cb 1]
+      switch $cb_type {
+        ready { eval [concat $cb_code $self] }
+        done {
+          if ![$self is_failure] {
+            eval [concat $cb_code [list $result]]
+          }
+        }
+        failed {
+          if [$self is_failure] {
+            eval [concat $cb_code [list $failure]]
+          }
+        }
+      }
+    }
+  }
+
+  method AssertReady {} {
+    if {!$is_ready} {
+      error "Future not ready"
+    }
+  }
+
+  method is_ready {} { return $is_ready }
+
+  method get {} {
+    $self AssertReady
+    if [$self is_failure] {
+      error $failure
+    }
+    return $result
+  }
+
+  method is_failure {} {
+    $self AssertReady
+    if [llength $failure] {
+      return 1
+    }
+    return 0
+  }
+
+  method failure {} {
+    $self AssertReady
+    return $failure
+  }
+
+  method await {} {
+    vwait "${selfns}::is_ready"
+  }
+}
 
 snit::type ten::read_channel {
   option -fh
@@ -53,4 +171,4 @@ snit::type ten::read_channel {
   }
 }
 
-package provide ten 0.0.01
+package provide ten 0.0.1