ErasureCodePlugin: plugin registry tests and example

libec_example.la is a fully functional plugin based on
ErasureCodeExample to test the ErasureCodePlugin abstract
interface. It is dynamically loaded to test the
ErasureCodePluginRegistry implementation.

Although the plugin is built in the test directory, it will be
installed. noinst_LTLIBRARIES won't build the shared library, only the
static version which is not suitable for testing.

http://tracker.ceph.com/issues/5878 refs #5878

Signed-off-by: Loic Dachary <loic@dachary.org>

3 files changed, 101 insertions, 0 deletions

diff --git a/src/test/Makefile.am b/src/test/Makefile.am
index da42ea01468..e793157c128 100644
--- a/src/test/Makefile.am
+++ b/src/test/Makefile.am
@@ -313,6 +313,22 @@ unittest_ceph_argparse_LDADD = $(UNITTEST_LDADD) $(CEPH_GLOBAL)
 unittest_ceph_argparse_CXXFLAGS = $(UNITTEST_CXXFLAGS)
 check_PROGRAMS += unittest_ceph_argparse
 
+libec_example_la_SOURCES = test/osd/ErasureCodePluginExample.cc
+libec_example_la_CFLAGS = ${AM_CFLAGS}
+libec_example_la_CXXFLAGS= ${AM_CXXFLAGS}
+libec_example_la_LIBADD = $(PTHREAD_LIBS) $(EXTRALIBS)
+libec_example_la_LDFLAGS = ${AM_LDFLAGS} -export-symbols-regex '.*__erasure_code_.*'
+erasure_codelib_LTLIBRARIES += libec_example.la
+
+unittest_erasure_code_plugin_SOURCES = test/osd/TestErasureCodePluginExample.cc 
+unittest_erasure_code_plugin_CXXFLAGS = ${AM_CXXFLAGS} ${UNITTEST_CXXFLAGS}
+unittest_erasure_code_plugin_LDADD = libosd.a libcommon.la $(UNITTEST_LDADD) $(CEPH_GLOBAL)
+if LINUX
+unittest_erasure_code_plugin_LDADD += -ldl
+endif
+check_PROGRAMS += unittest_erasure_code_plugin
+
+
 unittest_erasure_code_example_SOURCES = test/osd/TestErasureCodeExample.cc 
 noinst_HEADERS += test/osd/ErasureCodeExample.h
 unittest_erasure_code_example_CXXFLAGS = ${AM_CXXFLAGS} ${UNITTEST_CXXFLAGS}
diff --git a/src/test/osd/ErasureCodePluginExample.cc b/src/test/osd/ErasureCodePluginExample.cc
new file mode 100644
index 00000000000..1543b1cdaed
--- /dev/null
+++ b/src/test/osd/ErasureCodePluginExample.cc
@@ -0,0 +1,34 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2013 Cloudwatt <libre.licensing@cloudwatt.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ * 
+ */
+
+#include "osd/ErasureCodePlugin.h"
+#include "ErasureCodeExample.h"
+
+class ErasureCodePluginExample : public ErasureCodePlugin {
+public:
+  virtual int factory(const map<std::string,std::string> &parameters,
+                      ErasureCodeInterfaceRef *erasure_code)
+  {
+    *erasure_code = ErasureCodeInterfaceRef(new ErasureCodeExample(parameters));
+    return 0;
+  }
+};
+
+int __erasure_code_init(char *plugin_name)
+{
+  ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+  return instance.add(plugin_name, new ErasureCodePluginExample());
+}
diff --git a/src/test/osd/TestErasureCodePluginExample.cc b/src/test/osd/TestErasureCodePluginExample.cc
new file mode 100644
index 00000000000..67b41f2011a
--- /dev/null
+++ b/src/test/osd/TestErasureCodePluginExample.cc
@@ -0,0 +1,51 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2013 Cloudwatt <libre.licensing@cloudwatt.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ * 
+ */
+
+#include <errno.h>
+#include "common/Thread.h"
+#include "global/global_init.h"
+#include "osd/ErasureCodePlugin.h"
+#include "common/ceph_argparse.h"
+#include "global/global_context.h"
+#include "gtest/gtest.h"
+
+TEST(ErasureCodePluginRegistry, factory)
+{
+  map<std::string,std::string> parameters;
+  parameters["erasure-code-directory"] = ".libs";
+  ErasureCodeInterfaceRef erasure_code;
+  ErasureCodePluginRegistry &instance = ErasureCodePluginRegistry::instance();
+  EXPECT_FALSE(erasure_code);
+  EXPECT_EQ(0, instance.factory("example", parameters, &erasure_code));
+  EXPECT_TRUE(erasure_code);
+  ErasureCodePlugin *plugin = 0;
+  EXPECT_EQ(-EEXIST, instance.load("example", parameters, &plugin));
+}
+
+int main(int argc, char **argv) {
+  vector<const char*> args;
+  argv_to_vec(argc, (const char **)argv, args);
+
+  global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_UTILITY, 0);
+  common_init_finish(g_ceph_context);
+
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+
+// Local Variables:
+// compile-command: "cd ../.. ; make -j4 && make unittest_erasure_code_plugin && ./unittest_erasure_code_plugin --gtest_filter=*.* --log-to-stderr=true --debug-osd=20"
+// End: