Add the presentation slides for the intro and gRPC talks.

The slides are in German.

diff --git a/.gitmodules b/.gitmodules
new file mode 100644 (file)
index 0000000..722aed4
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tex/tokkeebeamer"]
+       path = tex/tokkeebeamer
+       url = git://git.tokkee.org/tokkeebeamer.git

diff --git a/README b/README
index 351ecbcb6e95369c0af0a2d882862557e25918c2..9cdba6e2f31d5fc0555db218032aa208efdcad9b 100644 (file)
--- a/README
+++ b/README
@@ -1,7 +1,7 @@
-       tokkee's Go and gRPC talk
-      ===========================
+       tokkee's Go and gRPC talks
+      ============================

 
 

-  Supporting material for a talk about Go and gRPC.
+  Supporting material for tokkee's talks about Go and gRPC.

 
 Setup
 -----
 
 Setup
 -----


@@ -46,9 +46,23 @@ Rebuilding the generated proto / gRPC code
     $ protoc src/tokkee.org/go-talk/grpc/proto/backend/backend.proto \
           --go_out=plugins=grpc:.
 
     $ protoc src/tokkee.org/go-talk/grpc/proto/backend/backend.proto \
           --go_out=plugins=grpc:.
 

+Presentation slides
+-------------------
+
+  The 'tex' subdirectory includes the LaTeX code for the presentation slides.
+
+  Generate PDF documents:
+
+    $ cd $GOPATH/src/tokkee.org/go-talk
+    $ git submodule update --init
+    $ cd tex; make
+

 Author
 ------
 
   Sebastian 'tokkee' Harl <sh@tokkee.org>
 
   Licensed under the 2-clause BSD license. See LICENSE for details.
 Author
 ------
 
   Sebastian 'tokkee' Harl <sh@tokkee.org>
 
   Licensed under the 2-clause BSD license. See LICENSE for details.

+
+  For license conditions of subpackages, see the respective LICENSE files in
+  the subdirectories.

diff --git a/tex/.gitignore b/tex/.gitignore
new file mode 100644 (file)
index 0000000..40f229b
--- /dev/null
+++ b/tex/.gitignore
@@ -0,0 +1,9 @@
+*.aux
+*.log
+*.nav
+*.out
+*.snm
+*.toc
+*.vrb
+go-intro.pdf
+go-grpc.pdf

diff --git a/tex/LICENSE b/tex/LICENSE
new file mode 100644 (file)
index 0000000..9088956
--- /dev/null
+++ b/tex/LICENSE
@@ -0,0 +1,108 @@
+Copyright (c) 2013-2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-----------------------------------------------------------------------------
+
+The Go gopher (gopher.png) was designed by Renee French.
+(http://reneefrench.blogspot.com/)
+
+The design is licensed under the Creative Commons 3.0 Attributions license.
+Read this article for more details: https://blog.golang.org/gopher
+
+You are free:
+* to share – to copy, distribute and transmit the work
+* to remix – to adapt the work
+
+Under the following conditions:
+* attribution – You must attribute the work in the manner specified by the
+  author or licensor (but not in any way that suggests that they endorse you
+  or your use of the work).
+* share alike – If you alter, transform, or build upon this work, you may
+  distribute the resulting work only under the same or similar license to this
+  one.
+
+Source: http://golang.org/doc/gopher/
+
+-----------------------------------------------------------------------------
+
+The gRPC logo (grpc.pdf) is licensed under the 3-clause BSD license:
+
+Copyright (c) 2015, grpc
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of grpc.github.io nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Source: https://github.com/grpc/grpc.github.io
+
+-----------------------------------------------------------------------------
+
+The LaTeX lstlistings language definition for Go (lstlang0.sty) is licensed
+under the MIT license:
+
+The MIT License (MIT)
+
+Copyright (c) 2016 Uriel Corfa
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+Source: https://github.com/korfuri/golang-latex-listings/

diff --git a/tex/Makefile b/tex/Makefile
new file mode 100644 (file)
index 0000000..fb8859c
--- /dev/null
+++ b/tex/Makefile
@@ -0,0 +1,13 @@
+TOKKEEBEAMER = tokkeebeamer
+include $(TOKKEEBEAMER)/tokkeebeamer.mk
+
+all: go-intro.pdf go-grpc.pdf
+
+go-intro.pdf: go-intro.tex tokkeebeamer/*.sty Makefile
+go-grpc.pdf: go-grpc.tex tokkeebeamer/*.sty Makefile
+
+clean:
+       rm -f *.aux *.log *.nav *.out *.snm *.toc *.vrb
+       rm -f go-intro.pdf go-grpc.pdf
+
+.PHONY: all clean

diff --git a/tex/go-grpc.tex b/tex/go-grpc.tex
new file mode 100644 (file)
index 0000000..f97072a
--- /dev/null
+++ b/tex/go-grpc.tex
@@ -0,0 +1,426 @@
+%
+% Copyright (C) 2015-2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
+% All rights reserved.
+%
+% Redistribution and use in source and binary forms, with or without
+% modification, are permitted provided that the following conditions
+% are met:
+% 1. Redistributions of source code must retain the above copyright
+%    notice, this list of conditions and the following disclaimer.
+% 2. Redistributions in binary form must reproduce the above copyright
+%    notice, this list of conditions and the following disclaimer in the
+%    documentation and/or other materials provided with the distribution.
+%
+% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+% ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+% TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+% PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+% CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+% EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+% PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+% OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+% WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+% OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+% ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+%
+\documentclass[presentation]{beamer}
+\uselanguage{German}
+
+\usetheme{tokkee}
+\usefonttheme{professionalfonts}
+
+\setbeamercolor*{block body}{fg=black,bg=white}
+\setbeamercolor*{block title}{use=titlelike,fg=titlelike.fg!80!black,bg=black!10}
+
+\usepackage{fontspec,xunicode,polyglossia}
+\setdefaultlanguage[spelling=new]{german}
+
+\usepackage{graphicx}
+\usepackage{xcolor}
+\definecolor{darkgreen}{rgb}{0,0.39,0}
+
+\usepackage{listings}
+\lstset{
+  basicstyle=\scriptsize,
+  language=Go,
+  frame=single,
+  numbers=left,
+  keywordstyle=\bfseries\color{darkgreen},
+  commentstyle=\itshape\color{blue},
+  stringstyle=\color{red},
+  showstringspaces=false,
+  backgroundcolor=\color{lightgray!25},
+  literate=%
+    {Ö}{{\"O}}1
+    {Ä}{{\"A}}1
+    {Ü}{{\"U}}1
+    {ß}{{\ss}}1
+    {ü}{{\"u}}1
+    {ä}{{\"a}}1
+    {ö}{{\"o}}1,
+}
+
+\usepackage[overlay,absolute]{textpos}
+
+\usepackage{tikz}
+\usetikzlibrary{shadows}
+\usetikzlibrary{shapes}
+
+\newcommand{\collectd}{\textsf{\textbf{collect}d}}
+
+\title{Web-Services mit Go}
+\subtitle{Go-Features an Hand von Beispielen}
+
+\titlegraphic{}
+
+\copyrightinfo{\copyright{} 2015-2016 Sebastian `tokkee' Harl}
+
+\author[Sebastian Harl]{Sebastian `tokkee' Harl\\
+  $<$sh@tokkee.org$>$}
+
+\date[2015-2016]{}
+
+\AtBeginSection[]
+{
+  \begin{frame}
+    \begin{center}
+      \Large
+      \titlebox{\secname}
+    \end{center}
+  \end{frame}
+}
+
+\begin{document}
+
+\begin{frame}[plain]
+  \titlepage
+\end{frame}
+
+\begin{frame}{Überblick}
+  \textbf{Was ist Go?}
+
+  \textit{Go is an open source programming language that makes it easy to
+  build simple, reliable, and efficient software.}\\[10mm]
+
+  \url{https://golang.org}
+
+  \begin{tikzpicture}[remember picture,overlay]
+    \node[anchor=north east] at (current page.east)
+      {\includegraphics[width=.7\textwidth]{gopher}};
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}{Web-Services}
+  \begin{itemize}
+      \item HTTP Frontend
+       \begin{itemize}
+         \item Viele parallele Client-Anfragen
+         \item Eine oder mehrere Verbindungen zu Backends
+       \end{itemize}
+      \item Backend ("`Business Logic"')
+       \begin{itemize}
+         \item Viele parallele Anfragen vom Frontend
+         \item Eine oder mehrere Datenbank-Verbindungen oder Interaktion mit
+           anderen Backends
+       \end{itemize}
+      \item Datenbank\\[3mm]
+
+      \item[$\Rightarrow$] skalierbare Micro-Services~/ \textbf{lose
+       Kopplung}\\[5mm]
+  \end{itemize}
+
+  \textbf{Auch:} Gleiche Prinzipien bei Integration mit anderen Lösungen
+\end{frame}
+
+\begin{frame}{Einschub: Go Standard Bibliothek}
+  \url{https://golang.org/pkg/}\\[5mm]
+
+  \begin{itemize}
+    \item Crypto
+    \item Datenbanken
+    \item Go Parser
+    \item Netzwerk, HTTP, SMTP, etc.
+    \item Datenstrukturen\\[7mm]
+  \end{itemize}
+
+  \textbf{Mehr?} $\Rightarrow$ \url{https://godoc.org/}
+\end{frame}
+
+\begin{frame}[fragile]{Ein Webserver}
+  \begin{lstlisting}
+import (...)
+
+func main() {
+  http.HandleFunc("/hallo", sageHallo)
+  log.Fatal(http.ListenAndServe(":9999", nil))
+}
+
+func sageHallo(w http.ResponseWriter, r *http.Request) {
+  fmt.Fprintf(w, "Hallo %s", r.RemoteAddr)
+}
+\end{lstlisting}
+
+  \begin{itemize}
+    \item \url{https://golang.org/pkg/log/}
+    \item \url{https://golang.org/pkg/net/http/}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Ein Webserver -- Templates}
+  \begin{lstlisting}
+var tmpl = template.Must(
+  template.New("results").Parse(`
+<html><head>
+<title>{{.Title}}</title>
+</head>
+
+<body>
+<h1>Hallo {{.Name}}</h1>
+</body></html>
+`))
+  \end{lstlisting}
+
+  \begin{itemize}
+    \item \url{https://golang.org/pkg/html/template/}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Ein Webserver -- Templates (2)}
+  \begin{lstlisting}
+func sageHallo(...) {
+  d := struct {
+    Title, Name string
+  }{"Hallo Welt", r.RemoteAddr}
+
+  var buf bytes.Buffer
+  if err := tmpl.Execute(&buf, d); err != nil {
+    http.Error(w, err.Error(), http.StatusInternalServerError)
+    return
+  }
+  io.Copy(w, &buf)
+}
+  \end{lstlisting}
+
+  \begin{itemize}
+    \item \url{https://golang.org/pkg/bytes/}
+    \item \url{https://golang.org/pkg/io/}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Einschub: io.Writer}
+  \begin{itemize}
+    \item Warum funktioniert fmt.Printf, tmpl.Execute, http.Error, io.Copy
+      eigentlich mit dem http.ResponseWriter und bytes.Buffer?
+  \end{itemize}
+
+  \begin{lstlisting}
+package io
+type Writer interface {
+    Write(p []byte) (n int, err error)
+}
+  \end{lstlisting}
+
+  \begin{itemize}
+    \item[$\Rightarrow$] \textbf{Sehr} einfaches Interface
+    \item[$\Rightarrow$] \texttt{http.ResponseWriter} und
+      \texttt{bytes.Buffer} implementieren es\\[7mm]
+  \end{itemize}
+
+  Viele andere Beispiele ...
+\end{frame}
+
+\begin{frame}[fragile]{Viele Backend-Abfragen}
+  \begin{lstlisting}
+func Query(*Request) (*Response, error) { ... }
+
+func anfrage(w http.ResponseWriter, r *http.Request) {
+  requests := []*Request{...}
+
+  responses := make([]*Reponse, len(requests))
+  errCh := make(chan error, len(requests))
+
+  for i, req := range requests {
+    go func(i int, req *Request) {
+      var err error
+      responses[i], err = Query(req)
+      errCh <- err
+    }(i, req)
+  }
+
+  // ...
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Viele Backend-Abfragen (2)}
+  \begin{lstlisting}
+  ...
+  timeout := time.After(50*time.Millisecond)
+
+  for range requests {
+    select {
+    case err := <-errCh:
+      if err != nil {
+        http.Error(w, err.Error(), http.StatusBadRequest)
+        return
+      }
+    case <-timeout:
+      http.Error(w, "timeout", http.StatusRequestTimeout)
+      return
+    }
+  }
+  // Alle Ergebnisse verfügbar.
+  \end{lstlisting}
+
+  \begin{itemize}
+    \item Siehe auch \url{https://golang.org/pkg/sync/#WaitGroup}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Spezielle Fehlerbehandlung}
+  \begin{lstlisting}
+  go func(req *Request) {
+    var err error
+    defer func() {
+      if e := recover(); e != nil {
+        err = fmt.Errorf("error while querying backend: %v", e)
+      }
+      errCh <- err
+    }()
+
+    responses[i], err = Query(req)
+  }(req)
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{Backends -- gRPC}
+  \textbf{Beispiel: Backend Kommunikation~/ API}\\[5mm]
+
+  \textit{A high performance, open source, general RPC framework that puts
+  mobile and HTTP/2 first.}\\[10mm]
+
+  \url{https://grpc.io}\\
+  \hfill\includegraphics[width=.3\textwidth]{grpc}
+\end{frame}
+
+\begin{frame}{gRPC Überblick}
+  \url{https://github.com/google/protobuf}\\[5mm]
+
+  \begin{itemize}
+    \item gRPC basiert auf Protocol Buffers
+    \item Unterstützung diverser Sprachen\newline
+      C++, Java, Go, Python, \ldots
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{gRPC Beispiel}
+  \begin{lstlisting}[morekeywords={syntax,service,message}]
+syntax "proto3";
+
+package mein_service;
+
+service Backend {
+  rpc Query(QueryRequest) return (QueryResponse);
+
+  // ...
+}
+
+message QueryRequest {
+  string query = 1;
+}
+
+message QueryResponse {
+  string type = 1;
+  int64 n = 2;
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{gRPC mit Go}
+  \begin{itemize}
+    \item Die "`protobuf"' Datei muss mittels des Protobuf Compilers und einer
+      gRPC Compiler-Erweiterung übersetzt werden
+    \item Der Compiler erzeugt Go Code, welcher Interfaces und generischen
+      Code erzeugt
+    \item Das Interface entspricht im Wesentlichen der \texttt{service}
+      Definition
+    \item Das Interface muss für den Server implementiert werden
+    \item Generischer Client-Code sollte ausreichen\newline
+      $\rightarrow$ API Entwurf!\\[7mm]
+  \end{itemize}
+
+  \url{https://github.com/grpc/grpc-go}\\
+  \url{https://golang.org/x/net/context}
+\end{frame}
+
+\begin{frame}[fragile]{gRPC mit Go: Server}
+  \begin{lstlisting}
+import pb "tokkee.net/mein_service/service_proto"
+
+type server struct{}
+
+func (*server) Query(ctx context.Context,
+  in *pb.QueryRequest) (*pb.QueryResponse, error) {
+
+  n, err := runQuery(in.Query)
+  if err != nil {
+    return nil, err
+  }
+  return &pb.QueryResponse{
+    Type: "irgendwas",
+    N:    n,
+  }, nil
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{gRPC mit Go: Server (2)}
+  \begin{lstlisting}
+func main() {
+  l, err := net.Listen("tcp", port)
+  if err != nil {
+    log.Fatal(err)
+  }
+
+  s := grpc.NewServer()
+  pb.RegisterBackendServer(s, &server{})
+  s.Serve(l)
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{gRPC mit Go: Client}
+  \begin{lstlisting}
+func main() {
+  ctx := context.Background()
+
+  conn, err := grpc.Dial("localhost:50051", grpc.WithInsecure())
+  if err != nil {
+    log.Fatal(err)
+  }
+  defer conn.Close()
+  c := pb.NewBackendClient(conn)
+
+  res, err := c.Query(ctx, &pb.QueryRequest{
+    Query: "ein query",
+  })
+  if err != nil {
+    log.Fatal(err)
+  }
+  fmt.Printf("Antwort vom Typ %q: %d\n", res.Type, res.N)
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{\inserttitle}
+  \begin{center}
+    Danke für die Aufmerksamkeit\\[2mm]
+    {\Large Fragen, Kommentare?}\\[6mm]
+
+    \url{https://golang.org}\quad—\quad
+    \url{https://github.com/grpc/grpc-go}
+  \end{center}
+\end{frame}
+
+\end{document}
+
+% vim: set shiftwidth=2 softtabstop=2 tabstop=8 noexpandtab spelllang=de_de :

diff --git a/tex/go-intro.tex b/tex/go-intro.tex
new file mode 100644 (file)
index 0000000..cb532e4
--- /dev/null
+++ b/tex/go-intro.tex
@@ -0,0 +1,493 @@
+%
+% Copyright (C) 2015-2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
+% All rights reserved.
+%
+% Redistribution and use in source and binary forms, with or without
+% modification, are permitted provided that the following conditions
+% are met:
+% 1. Redistributions of source code must retain the above copyright
+%    notice, this list of conditions and the following disclaimer.
+% 2. Redistributions in binary form must reproduce the above copyright
+%    notice, this list of conditions and the following disclaimer in the
+%    documentation and/or other materials provided with the distribution.
+%
+% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+% ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+% TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+% PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+% CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+% EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+% PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+% OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+% WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+% OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+% ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+%
+\documentclass[presentation]{beamer}
+\uselanguage{German}
+
+\usetheme{tokkee}
+\usefonttheme{professionalfonts}
+
+\usepackage{xeCJK}
+\renewcommand\CJKfamilydefault{\CJKsfdefault}
+\setCJKsansfont{WenQuanYi Zen Hei}
+
+\setbeamercolor*{block body}{fg=black,bg=white}
+\setbeamercolor*{block title}{use=titlelike,fg=titlelike.fg!80!black,bg=black!10}
+
+\usepackage{fontspec,xunicode,polyglossia}
+\setdefaultlanguage[spelling=new]{german}
+
+\usepackage{graphicx}
+\usepackage{xcolor}
+\definecolor{darkgreen}{rgb}{0,0.39,0}
+
+\usepackage{listings}
+\lstset{
+  language=Go,
+  frame=single,
+  numbers=left,
+  keywordstyle=\bfseries\color{darkgreen},
+  commentstyle=\itshape\color{blue},
+  stringstyle=\color{red},
+  showstringspaces=false,
+  backgroundcolor=\color{lightgray!25},
+  literate=%
+    {Ö}{{\"O}}1
+    {Ä}{{\"A}}1
+    {Ü}{{\"U}}1
+    {ß}{{\ss}}1
+    {ü}{{\"u}}1
+    {ä}{{\"a}}1
+    {ö}{{\"o}}1,
+}
+
+\usepackage[overlay,absolute]{textpos}
+
+\usepackage{tikz}
+\usetikzlibrary{shadows}
+\usetikzlibrary{shapes}
+
+\title[Programmieren mit Go]{Programmieren mit Go}
+
+\titlegraphic{}
+
+\copyrightinfo{\copyright{} 2015-2016 Sebastian `tokkee' Harl}
+
+\author[Sebastian Harl]{Sebastian `tokkee' Harl\\
+  $<$sh@tokkee.org$>$}
+
+\date[2015-2016]{}
+
+\AtBeginSection[]
+{
+  \begin{frame}
+    \begin{center}
+      \Large
+      \titlebox{\secname}
+    \end{center}
+  \end{frame}
+}
+
+\begin{document}
+
+\begin{frame}[plain]
+  \titlepage
+\end{frame}
+
+\begin{frame}{Überblick}
+  \textbf{Was ist Go?}
+
+  \begin{itemize}
+    \item \url{https://golang.org/}
+    \item Open Source Programmiersprache
+    \item imperativ, Interfaces, Pakete
+    \item statisch typisiert, kompiliert
+    \item Nebenläufigkeit
+    \item Garbage Collection
+  \end{itemize}
+
+  \begin{tikzpicture}[remember picture,overlay]
+    \node[anchor=east] at (current page.east)
+      {\includegraphics[width=.7\textwidth]{gopher}};
+  \end{tikzpicture}
+\end{frame}
+
+\begin{frame}[fragile]{Hallo 世界}
+  \begin{lstlisting}
+package main
+
+import "fmt"
+
+func main() {
+  fmt.Println("Hallo 世界")
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Programm übersetzen / ausführen}
+  \begin{lstlisting}[language=bash,numbers=none]
+% go build -o hallo hallo.go
+% ./hallo
+Hallo 世界
+
+% go run hallo.go
+Hallo 世界
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{Go Playground}
+  \begin{center}
+    \fbox{\includegraphics[width=.9\textwidth]{playground}}
+  \end{center}
+\end{frame}
+
+\begin{frame}[fragile]{Pakete / Bibliotheken}
+  \begin{lstlisting}
+package zeichenkette
+
+func Rückwärts(s string) string {
+  r := []rune(s)
+  for i := 0; i < len(r)/2; i++ {
+    j := len(r) - i - 1
+    r[j], r[i] = r[i], r[j]
+  }
+  return string(r)
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Pakete verwenden}
+  \begin{itemize}
+    \item \texttt{\$GOPATH/src} ist der Suchpfad für extra Pakete
+    \item \texttt{import "$<$paketname$>$"}
+  \end{itemize}
+
+  \begin{lstlisting}
+package main
+
+import (
+  "fmt"
+
+  zk "tokkee.org/zeichenkette"
+)
+
+func main() {
+  fmt.Println(zk.Rückwärts("Hallo 世界"))
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Arbeitsumgebung}
+  \begin{verbatim}
+$GOPATH
+  |\
+  | `- bin/
+  |     \
+  |      `- hallo
+   \
+    `- src/
+        \
+         `- hallo/
+             \
+              `- hallo.go
+  \end{verbatim}
+\end{frame}
+
+\begin{frame}{Arbeitsumgebung (2)}
+  \begin{itemize}
+    \item \lstinline[language=sh]{go build -o hallo_welt hallo}
+    \item \lstinline[language=sh]{go install hallo}
+    \item \lstinline[language=sh]{go doc hallo}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Fehlerbehandlung}
+  \begin{lstlisting}
+func machEs() (*Object, error) {
+  var o Object
+  if err := o.init(); err != nil {
+    return nil, err
+  }
+  return &o, nil
+}
+
+func main() {
+  o, err := machEs()
+  if err != nil {
+    log.Exitf("Fehler: %v\n", err)
+  }
+  // ...
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Komplexe Datenstrukturen}
+  \textbf{Array / Slice}
+  \begin{lstlisting}
+var array [3]string
+array[0] = "ein"
+array[1] = "String"
+fmt.Println(array)
+  \end{lstlisting}
+
+  \begin{lstlisting}
+var slice []string
+slice = array[:]
+slice = append(slice, "usw", "usf")
+slice = []string{"ein", "anderer", "String"}
+fmt.Println(slice)
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Komplexe Datenstrukturen (2)}
+  \textbf{Map}
+  \begin{lstlisting}
+var m map[string]int
+m = make(map[string]int) // Map anlegen
+m = map[string]int{      // Map initialisieren
+  "a": 1,
+  "b": 2,
+}
+m["c"] = 3
+fmt.Println(m["a"])
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Komplexe Datenstrukturen (3)}
+  \textbf{Struct}
+  \begin{lstlisting}
+type Ding struct {
+  privat     float32
+  Öffentlich string
+}
+d := Ding{
+  Öffentlich: "Daten für Alle!",
+  privat:     47.11,
+}
+d.privat = 3.1415926535
+fmt.Println(d)
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Komplexe Datenstrukturen (4)}
+  \textbf{Interface / Methoden}
+  \begin{lstlisting}
+type Macher interface {
+  Mach(int, int) string
+}
+type MeinMacher struct {}
+func (m MeinMacher) Mach(a, b int) string {
+  return fmt.Sprintf("%d x %d = %d", a, b, a*b)
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{Übung: Quadratwurzel}
+  \url{https://go-tour-de.appspot.com/flowcontrol/8}\\
+  \url{https://de.wikipedia.org/wiki/Newton-Verfahren}\\[5mm]
+
+  Berechne die Quadratwurzel (\lstinline{Wurzel(x float64)}) mit Hilfe des
+  Newton-Verfahren:
+
+  \begin{equation*}
+    z_{n+1} = z_n - \frac{z_n^2 - x}{2 * z_n}
+  \end{equation*}
+
+  Erstelle dazu ein eigenes Paket und ein Programm zum testen. Verwende
+  entweder eine Schleife mit fester Anzahl an Durchläufen oder bis sich das
+  Ergebnis nicht (kaum) mehr ändert.
+\end{frame}
+
+\begin{frame}{Die Standard-Bibliothek}
+  \url{https://golang.org/pkg/}\\[5mm]
+
+  \begin{itemize}
+    \item Crypto
+    \item Datenbanken
+    \item Go Parser
+    \item Netzwerk, HTTP, SMTP, etc.
+    \item Datenstrukturen
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{Weitere Bibliotheken}
+  \url{https://godoc.org/}\\[5mm]
+
+  \begin{itemize}
+    \item Vielzahl an Open Source Bibliotheken
+    \item \lstinline[language=sh]{go get github.com/user/pkg}
+    \item \url{https://gopkg.in}
+      \begin{itemize}
+       \item Versionierung von Bibliotheken auf Github
+       \item \url{v3} zeigt auf Branch/Tag \url{v3}, \url{v3.N} oder
+         \url{v3.N.M}
+       \item \url{gopkg.in/pkg.v3} $\rightarrow$ \url{github.com/go-pkg/pkg}
+       \item \url{gopkg.in/user/pkg.v3} $\rightarrow$
+         \url{github.com/user/pkg}
+      \end{itemize}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Ein Webserver}
+  \url{https://golang.org/pkg/net/http/}
+  \begin{lstlisting}
+func main() {
+  http.HandleFunc("/hallo", sageHallo)
+  log.Fatal(http.ListenAndServe(":9999", nil))
+}
+
+func sageHallo(w http.ResponseWriter,
+  r *http.Request) {
+
+  fmt.Fprintf(w, "Hallo %s", r.RemoteAddr)
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{Nebenläufigkeit}
+  \textbf{Alle Anfragen werden nebenläufig behandelt.}\\[5mm]
+
+  \begin{itemize}
+    \item Goroutinen
+      \begin{itemize}
+       \item \texttt{go f(args)}
+       \item leichtgewichtige Threads
+       \item hunderte oder tausende werden effizient verwaltet
+      \end{itemize}
+    \item Channels
+      \begin{itemize}
+       \item Kommunikation zwischen Goroutinen
+      \end{itemize}
+    \item \texttt{select}
+      \begin{itemize}
+       \item warten auf I/O und Channels
+      \end{itemize}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Goroutinen}
+  \begin{lstlisting}
+errCh := make(chan error, 2)
+
+go func() {
+  errCh <- machEs()
+}()
+go func() {
+  errCh <- undDas()
+}()
+
+go machEtwasImHintergrund()
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Goroutinen (2)}
+  \url{https://golang.org/pkg/time/}
+  \begin{lstlisting}
+timeout := time.After(50*time.Millisecond)
+for i := 0; i < cap(errCh); i++ {
+  select {
+  case err := <- errCh:
+    if err != nil {
+      return err
+    }
+  case <-timeout:
+    return fmt.Errorf("timeout(%d)", i)
+  }
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Goroutinen (3)}
+  \textbf{Synchronisierung}\\
+  \url{https://golang.org/pkg/sync/}
+  \begin{lstlisting}
+daten := []Object{...}
+var wg sync.WaitGroup
+for _, d := range daten {
+  wg.Add(1)
+  go func(o Object) {
+    defer wg.Done()
+    verarbeite(o)
+  }(d) // <- !!!
+}
+wg.Wait()
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Unit Tests}
+  \url{https://golang.org/pkg/testing/}
+  \begin{lstlisting}
+package zeugs
+
+// mult multipliziert die beiden
+// übergebenen Argumente und gibt
+// das Ergebnis zurück.
+func mult(a, b int) int {
+  return a * b
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Unit Tests (2)}
+  \begin{lstlisting}
+package zeugs
+func TestMult(t *testing.T) {
+  for _, test := range []struct{
+    a, b, want int
+  }{
+    {3, 4, 12},
+    {7, 8, 56},
+  } {
+    if r := mult(test.a, test.b); r != test.want {
+      t.Errorf("mult(%d, %d) = %d; want %d",
+        test.a, test.b, r, test.want)
+    }
+  }
+}
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{Übung: Äquivalente Binärbäume}
+  \url{https://go-tour-de.appspot.com/concurrency/7}\\
+  \url{https://godoc.org/golang.org/x/tour/tree}\\
+  \url{https://de.wikipedia.org/wiki/Binärbaum}\\[5mm]
+
+  \begin{itemize}
+    \item Implementiere die \lstinline{Same(t1, t2 *tree.Tree)} Funktion aus
+      der Online-Übung.
+    \item Zusätzlich: Erstelle einen Unit-Test für die Funktion.
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Werkzeuge}
+  \textbf{Go ist dazu gedacht, in Werkzeugen verwendet zu werden
+  (\texttt{go/ast}, etc.)}\\[5mm]
+
+  \begin{itemize}
+    \item gofmt, goimports
+    \item godoc, \url{https://godoc.org/}
+    \item IDE und Editor Unterstützung
+  \end{itemize}
+
+  \textbf{vim:}
+  \begin{lstlisting}[language=bash,morekeywords={autocmd,let}]
+autocmd filetype go
+  \ autocmd BufWritePre <buffer> Fmt
+let g:gofmt_command = "goimports"
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{\inserttitle}
+  \begin{center}
+    Danke für die Aufmerksamkeit\\[2mm]
+    {\Large Fragen, Kommentare?}\\[6mm]
+
+    \url{https://tour.golang.org}\quad—\quad
+    \url{https://play.golang.org}
+  \end{center}
+\end{frame}
+
+\end{document}
+
+% vim: set shiftwidth=2 softtabstop=2 tabstop=8 noexpandtab spelllang=de_de :

diff --git a/tex/gopher.png b/tex/gopher.png
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diff --git a/tex/lstlang0.sty b/tex/lstlang0.sty
new file mode 100644 (file)
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+++ b/tex/lstlang0.sty
@@ -0,0 +1,35 @@
+%% Listings definition for Go language
+%% Go language reference : http://www.golang.org
+%% Author : Uriel Corfa <uriel@corfa.fr>
+%% Project home: https://bitbucket.org/korfuri/golang-latex-listings
+
+\ProvidesFile{lstlang0.sty}
+             [2012/04/13 1.1 listings language file for GoLang]
+\lst@definelanguage{Go}{
+  % Keywords as defined in the BNF
+  morekeywords=[1]{break,default,func,interface,%
+    case,defer,go,map,struct,chan,else,goto,package,%
+    switch,const,fallthrough,if,range,type,continue,%
+    for,import,return,var,select},
+  % Special identifiers, builtin functions
+  morekeywords=[2]{make,new,nil,len,cap,copy,complex,%
+    real,imag,panic,recover,print,println,iota,close,%
+    closed,_,true,false,append,delete},
+  % Basic types
+  morekeywords=[3]{%
+    string,int,uint,uintptr,double,float,byte,%
+    int8,int16,int32,int64,int128,%
+    uint8,uint16,uint32,uint64,uint128,%
+    float32,float64,complex64,complex128,%
+    rune},
+  % Strings : "toto", 'toto', `toto`
+  morestring=[b]{"},
+  morestring=[b]{'},
+  morestring=[b]{`},
+  % Comments : /* comment */ and // comment
+  comment=[l]{//},
+  morecomment=[s]{/*}{*/},
+  % Options
+  sensitive=true
+}
+\endinput

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diff --git a/tex/tokkeebeamer b/tex/tokkeebeamer
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+++ b/tex/tokkeebeamer
@@ -0,0 +1 @@
+Subproject commit dfe1e789923b1c5e33cca4e06a123fbf6bf4036f