---
name: "ACE_Caching_Strategy_Adapter"
section: "3"
platform: "linux"
package: "libace-doc"
version: "5.0.7-4"
release: "Debian 2.2 (Potato)"
platforms: ["linux"]
url: "https://new.carta.tech/ACE_Caching_Strategy_Adapter"
---

# ACE\_Caching\_Strategy\_Adapter(3)

This class follows the Adaptor pattern and is used to provide External Polymorphism by deriving from ACE\_Caching\_Strategy.

## NAME

ACE\_Caching\_Strategy\_Adapter -  This class follows the Adaptor pattern and is used to provide External Polymorphism by deriving from ACE\_Caching\_Strategy.

## SYNOPSIS

```
#include <ace/Caching_Strategies_T.h>
template<class ATTRIBUTES, class CACHING_UTILITY, class IMPLEMENTATION>
class ACE_Caching_Strategy_Adapter :
  public ACE_Caching_Strategy<ATTRIBUTES, CACHING_UTILITY>
{
  public:
    ACE_Caching_Strategy_Adapter (
        IMPLEMENTATION *implementation = 0,
        int delete_implementation = 0
        );
    ~ACE_Caching_Strategy_Adapter (void);
    ATTRIBUTES attributes (void);
    double purge_percent (void);
    void purge_percent (double percentage);
    int notify_bind (int result, const ATTRIBUTES &attr);
    int notify_find (int result, ATTRIBUTES &attr);
    int notify_unbind (int result, const ATTRIBUTES &attr);
    int notify_trybind (int result, ATTRIBUTES &attr);
    int notify_rebind (int result, const ATTRIBUTES &attr);
    IMPLEMENTATION &implementation (void);
    CACHING_UTILITY &caching_utility (void);
    void dump (void) const;
  private:
    IMPLEMENTATION *implementation_;
    int delete_implementation_;
};
```

## DESCRIPTION

This class simply delegates all requests to the IMPLEMNETATION object within. This class should be passed in place of the the abstract base ACE\_Caching\_Strategy class as part of the External Polymorphism pattern.

## Accessor methods for the percentage of entries to purge.

```
double purge_percent (void);
```

```
void purge_percent (double percentage);
```

## Strategy related Operations

```
int notify_bind (int result, const ATTRIBUTES &attr);
```

This method acts as a notification about the CONTAINERs bind method call.

```
int notify_find (int result, ATTRIBUTES &attr);
```

This method acts as a notification about the CONTAINERs find method call

```
int notify_unbind (int result, const ATTRIBUTES &attr);
```

This method acts as a notification about the CONTAINERs unbind method call

```
int notify_trybind (int result, ATTRIBUTES &attr);
```

This method acts as a notification about the CONTAINERs trybind method call

```
int notify_rebind (int result, const ATTRIBUTES &attr);
```

This method acts as a notification about the CONTAINERs rebind method call

```
IMPLEMENTATION &implementation (void);
```

Accessor to the implementation.

```
CACHING_UTILITY &caching_utility (void);
```

Purge the cache.

```
void dump (void) const;
```

Dumps the state of the object.

## AUTHOR

Kirthika Parameswaran kirthika@cs.wustl.edu

## LIBRARY

ace