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<dt style="clear: both; float: left; font-weight: bold; width: 8em">Author</dt>
<dd style="margin-left: 8.5em">Kouhei Sutou <kou****@clear*****></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Date</dt>
<dd style="margin-left: 8.5em">2014-04-22 12:10:06 +0900 (Tue, 22 Apr 2014)</dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">New Revision</dt>
<dd style="margin-left: 8.5em"><a href="https://github.com/droonga/droonga-engine/commit/e5d6cb7d25388b50c3a31cd898ad8ca740f3b84d">e5d6cb7d25388b50c3a31cd898ad8ca740f3b84d</a></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Message</dt>
<dd style="margin-left: 8.5em"><pre style="border: 1px solid #aaa; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; padding: 0.5em; width: auto">droonga-engine: implement graceful restart</pre></dd>
<dt style="clear: both; float: left; font-weight: bold; width: 8em">Modified files</dt>
<dd style="margin-left: 8.5em">
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<li><a href="https://github.com/droonga/droonga-engine/commit/e5d6cb7d25388b50c3a31cd898ad8ca740f3b84d#diff-0">lib/droonga/engine/command/droonga_engine.rb</a></li>
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<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre"> Modified: lib/droonga/engine/command/droonga_engine.rb (+35 -2)</span>
<span class="diff-header-mark" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">===================================================================</span>
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</pre>
</th>
<td class="diff-content" style="border: 1px solid #aaa">
<pre style="border: 0; font-family: Consolas, Menlo, "Liberation Mono", Courier, monospace; line-height: 1.2; margin: 0; padding: 0.5em; white-space: normal; width: auto"><span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -133,7 +133,7 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> parser.parse!(command_line_arguments)</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">- def run_service</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ def run_service(ready_notify_fd=nil)</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> listen_fd = @listen_socket.fileno</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> heartbeat_fd = @heartbeat_socket.fileno</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> env = {}</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -149,6 +149,10 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> listen_fd => listen_fd,</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> heartbeat_fd => heartbeat_fd,</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> }</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ if ready_notify_fd</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ command_line.push("--ready-notify-fd", ready_notify_fd.to_s)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ options[ready_notify_fd] = ready_notify_fd</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> spawn(env, *command_line, options)</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -168,11 +172,21 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> Process.kill(Signals::IMMEDIATE_STOP, service_pid)</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> running = false</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ trap(Signals::GRACEFUL_RESTART) do</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ old_service_pid = service_pid</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ IO.pipe do |ready_notify_read_io, ready_notify_write_io|</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ service_pid = run_service(ready_notify_write_io.fileno)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ ready_notify_write_io.close</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ IO.select([ready_notify_read_io])</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ Process.kill(Signals::GRACEFUL_STOP, old_service_pid)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-not-changed" style="display: block; white-space: pre"> succeeded = true</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> while running</span>
<span class="diff-deleted" style="background-color: #ffaaaa; color: #000000; display: block; white-space: pre">- service_pid = run_service</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ service_pid ||= run_service</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> _, status = Process.waitpid2(service_pid)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ service_pid = nil</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> if status.nil?</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> succeeded = false</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> break</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -198,6 +212,7 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> @configuration = Configuration.new</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> @listen_fd = nil</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> @heartbeat_fd = nil</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ @ready_notiofy_fd = nil</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-not-changed" style="display: block; white-space: pre"> def run(command_line_arguments)</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -232,6 +247,10 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> "Use FD as the heartbeat file descriptor") do |fd|</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> @heartbeat_fd = fd</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ parser.on("--ready-notify-fd=FD", Integer,</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ "Use FD for notifying the service ready") do |fd|</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ @ready_notify_fd = fd</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-not-changed" style="display: block; white-space: pre"> def run_services</span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -243,6 +262,7 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> run_engine</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> run_receiver</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> setup_signals</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ notify_ready</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> @loop.run</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> </span>
<span class="diff-hunk-header" style="background-color: #eaf2f5; color: #999999; display: block; white-space: pre">@@ -329,6 +349,19 @@ <span class="diff-context" style="background-color: #ffffaa; color: #000000">module Droonga</span></span>
<span class="diff-not-changed" style="display: block; white-space: pre"> stop_graceful</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> shutdown_services</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ def notify_ready</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ return if @ready_notify_fd.nil?</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ ready_notify_io = IO.new(@ready_notify_fd)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ @ready_notify_fd = nil</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ watcher = Coolio::IOWatcher.new(ready_notify_io, "w")</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ @loop.attach(watcher)</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ watcher.on_writable do</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ ready_notify_io.write("ready\n")</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ ready_notify_io.close</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ detach</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-added" style="background-color: #aaffaa; color: #000000; display: block; white-space: pre">+ end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
<span class="diff-not-changed" style="display: block; white-space: pre"> end</span>
</pre>
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