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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "publish/repository.h" |
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#include <cassert> |
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#include <string> |
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#include "catalog_counters.h" |
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#include "catalog_diff_tool.h" |
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#include "catalog_mgr_ro.h" |
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#include "crypto/hash.h" |
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#include "file_chunk.h" |
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#include "history_sqlite.h" |
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#include "publish/except.h" |
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#include "shortstring.h" |
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#include "statistics.h" |
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#include "xattr.h" |
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namespace { |
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static history::History::Tag GetTag(const std::string &tag_name, |
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const history::History &history) |
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{ |
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assert(!tag_name.empty()); |
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history::History::Tag tag; |
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if (tag_name[0] == publish::Repository::kRawHashSymbol) { |
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tag.name = tag_name.substr(1); |
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tag.root_hash = |
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shash::MkFromHexPtr(shash::HexPtr(tag.name), shash::kSuffixCatalog); |
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} else { |
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bool retval = history.GetByName(tag_name, &tag); |
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if (!retval) |
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throw publish::EPublish("unknown repository tag name: " + tag_name); |
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} |
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return tag; |
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} |
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class DiffForwarder : public CatalogDiffTool<catalog::SimpleCatalogManager> { |
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private: |
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publish::DiffListener *listener_; |
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public: |
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DiffForwarder(catalog::SimpleCatalogManager *old_mgr, |
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catalog::SimpleCatalogManager *new_mgr, |
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publish::DiffListener *listener) |
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: CatalogDiffTool<catalog::SimpleCatalogManager>(old_mgr, new_mgr) |
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, listener_(listener) |
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{ |
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} |
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virtual ~DiffForwarder() {} |
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virtual bool ReportAddition(const PathString& path, |
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const catalog::DirectoryEntry& entry, |
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const XattrList& /* xattrs */, |
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const FileChunkList& /* chunks */) |
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{ |
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listener_->OnAdd(path.ToString(), entry); |
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return true; |
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} |
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virtual void ReportRemoval(const PathString& path, |
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const catalog::DirectoryEntry& entry) |
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{ |
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listener_->OnRemove(path.ToString(), entry); |
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} |
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virtual bool ReportModification(const PathString& path, |
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const catalog::DirectoryEntry& old_entry, |
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const catalog::DirectoryEntry& new_entry, |
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const XattrList& /*xattrs */, |
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const FileChunkList& /* chunks */) |
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{ |
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listener_->OnModify(path.ToString(), old_entry, new_entry); |
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return true; |
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} |
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}; // class DiffForwarder |
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} // anonymous namespace |
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namespace publish { |
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void Repository::Diff(const std::string &from, const std::string &to, |
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DiffListener *diff_listener) |
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{ |
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history::History::Tag from_tag = GetTag(from, *history_); |
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history::History::Tag to_tag = GetTag(to, *history_); |
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diff_listener->OnInit(from_tag, to_tag); |
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perf::Statistics stats_from; |
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catalog::SimpleCatalogManager *mgr_from = new catalog::SimpleCatalogManager( |
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from_tag.root_hash, |
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settings_.url(), |
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settings_.tmp_dir(), |
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download_mgr_, |
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&stats_from, |
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true /* manage_catalog_files */); |
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mgr_from->Init(); |
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perf::Statistics stats_to; |
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catalog::SimpleCatalogManager *mgr_to = new catalog::SimpleCatalogManager( |
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to_tag.root_hash, |
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settings_.url(), |
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settings_.tmp_dir(), |
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download_mgr_, |
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&stats_to, |
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true /* manage_catalog_files */); |
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mgr_to->Init(); |
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catalog::Counters counters_from = mgr_from->GetRootCatalog()->GetCounters(); |
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catalog::Counters counters_to = mgr_to->GetRootCatalog()->GetCounters(); |
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diff_listener->OnStats(catalog::Counters::Diff(counters_from, counters_to)); |
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// DiffTool takes ownership of the catalog managers |
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DiffForwarder diff_forwarder(mgr_from, mgr_to, diff_listener); |
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if (!diff_forwarder.Init()) |
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throw EPublish("cannot initialize difference engine"); |
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diff_forwarder.Run(PathString()); |
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} |
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} // namespace publish |
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