Support for memory-only caching

[apt.git] / apt-pkg / acquire-item.h

diff --git a/apt-pkg/acquire-item.h b/apt-pkg/acquire-item.h
index 4429b1ceb8cef4cf1ac516cf36ded10be729564a..3079c68efd8dfc91d3cb52a7e1958fac7f0599f7 100644 (file)
--- a/apt-pkg/acquire-item.h
+++ b/apt-pkg/acquire-item.h
@@ -1,19 +1,19 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: acquire-item.h,v 1.15 1999/01/31 22:25:34 jgg Exp $
+// $Id: acquire-item.h,v 1.19 1999/04/11 21:23:09 jgg Exp $
 /* ######################################################################
 
    Acquire Item - Item to acquire
 
    When an item is instantiated it will add it self to the local list in
    the Owner Acquire class. Derived classes will then call QueueURI to 
-   register all the URI's they wish to fetch for at the initial moment.   
+   register all the URI's they wish to fetch at the initial moment.   
    
    Two item classes are provided to provide functionality for downloading
    of Index files and downloading of Packages.
    
    A Archive class is provided for downloading .deb files. It does Md5
-   checking and source location.
+   checking and source location as well as a retry algorithm.
    
    ##################################################################### */
                                                                        /*}}}*/
@@ -33,11 +33,13 @@ class pkgAcquire::Item
 {  
    protected:
    
+   // Some private helper methods for registering URIs
    pkgAcquire *Owner;
    inline void QueueURI(ItemDesc &Item)
                  {Owner->Enqueue(Item);};
    inline void Dequeue() {Owner->Dequeue(this);};
    
+   // Safe rename function with timestamp preservation
    void Rename(string From,string To);
    
    public:
@@ -46,6 +48,7 @@ class pkgAcquire::Item
    enum {StatIdle, StatFetching, StatDone, StatError} Status;
    string ErrorText;
    unsigned long FileSize;
+   unsigned long PartialSize;   
    char *Mode;
    unsigned long ID;
    bool Complete;
@@ -57,14 +60,16 @@ class pkgAcquire::Item
    // File to write the fetch into
    string DestFile;
 
+   // Action members invoked by the worker
    virtual void Failed(string Message,pkgAcquire::MethodConfig *Cnf);
    virtual void Done(string Message,unsigned long Size,string Md5Hash);
    virtual void Start(string Message,unsigned long Size);
-   virtual string MD5Sum() {return string();};
-   virtual string Describe() = 0;
-   
    virtual string Custom600Headers() {return string();};
-      
+   virtual string DescURI() = 0;
+   
+   // Inquire functions
+   virtual string MD5Sum() {return string();};
+         
    Item(pkgAcquire *Owner);
    virtual ~Item();
 };
@@ -81,9 +86,10 @@ class pkgAcqIndex : public pkgAcquire::Item
    
    public:
    
+   // Specialized action members
    virtual void Done(string Message,unsigned long Size,string Md5Hash);   
    virtual string Custom600Headers();
-   virtual string Describe();
+   virtual string DescURI() {return Location->PackagesURI();};
 
    pkgAcqIndex(pkgAcquire *Owner,const pkgSourceList::Item *Location);
 };
@@ -98,10 +104,11 @@ class pkgAcqIndexRel : public pkgAcquire::Item
    
    public:
    
+   // Specialized action members
    virtual void Failed(string Message,pkgAcquire::MethodConfig *Cnf);
    virtual void Done(string Message,unsigned long Size,string Md5Hash);   
    virtual string Custom600Headers();
-   virtual string Describe();
+   virtual string DescURI() {return Location->ReleaseURI();};
    
    pkgAcqIndexRel(pkgAcquire *Owner,const pkgSourceList::Item *Location);
 };
@@ -111,6 +118,7 @@ class pkgAcqArchive : public pkgAcquire::Item
 {
    protected:
    
+   // State information for the retry mechanism
    pkgCache::VerIterator Version;
    pkgAcquire::ItemDesc Desc;
    pkgSourceList *Sources;
@@ -119,19 +127,38 @@ class pkgAcqArchive : public pkgAcquire::Item
    string &StoreFilename;
    pkgCache::VerFileIterator Vf;
    unsigned int Retries;
-   
+
+   // Queue the next available file for download.
    bool QueueNext();
    
    public:
    
+   // Specialized action members
    virtual void Failed(string Message,pkgAcquire::MethodConfig *Cnf);
-   virtual string MD5Sum() {return MD5;};
    virtual void Done(string Message,unsigned long Size,string Md5Hash);
-   virtual string Describe();
+   virtual string MD5Sum() {return MD5;};
+   virtual string DescURI() {return Desc.URI;};
    
    pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
                 pkgRecords *Recs,pkgCache::VerIterator const &Version,
                 string &StoreFilename);
 };
 
+// Fetch a generic file to the current directory
+class pkgAcqFile : public pkgAcquire::Item
+{
+   pkgAcquire::ItemDesc Desc;
+   string MD5;
+   
+   public:
+   
+   // Specialized action members
+   virtual void Done(string Message,unsigned long Size,string Md5Hash);
+   virtual string MD5Sum() {return MD5;};
+   virtual string DescURI() {return Desc.URI;};
+   
+   pkgAcqFile(pkgAcquire *Owner,string URI,string MD5,unsigned long Size,
+                 string Desc,string ShortDesc);
+};
+
 #endif