MQTTClientPersistence.h

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/*******************************************************************************
 * Copyright (c) 2009, 2020 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * and Eclipse Distribution License v1.0 which accompany this distribution. 
 *
 * The Eclipse Public License is available at 
 *    https://www.eclipse.org/legal/epl-2.0/
 * and the Eclipse Distribution License is available at 
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Ian Craggs - initial API and implementation and/or initial documentation
 *******************************************************************************/

/*
*/
#if !defined(MQTTCLIENTPERSISTENCE_H)
#define MQTTCLIENTPERSISTENCE_H
/*
*/

#define MQTTCLIENT_PERSISTENCE_DEFAULT 0

#define MQTTCLIENT_PERSISTENCE_NONE 1

#define MQTTCLIENT_PERSISTENCE_USER 2

#define MQTTCLIENT_PERSISTENCE_ERROR -2

typedef int (*Persistence_open)(void** handle, const char* clientID, const char* serverURI, void* context);

typedef int (*Persistence_close)(void* handle); 

typedef int (*Persistence_put)(void* handle, char* key, int bufcount, char* buffers[], int buflens[]);

typedef int (*Persistence_get)(void* handle, char* key, char** buffer, int* buflen);

typedef int (*Persistence_remove)(void* handle, char* key);

typedef int (*Persistence_keys)(void* handle, char*** keys, int* nkeys);

typedef int (*Persistence_clear)(void* handle);

typedef int (*Persistence_containskey)(void* handle, char* key);

typedef struct {
    void* context;
    Persistence_open popen;
    Persistence_close pclose;
    Persistence_put pput;
    Persistence_get pget;
    Persistence_remove premove;
    Persistence_keys pkeys;
    Persistence_clear pclear;
    Persistence_containskey pcontainskey;
} MQTTClient_persistence;


typedef int MQTTPersistence_beforeWrite(void* context, int bufcount, char* buffers[], int buflens[]);


typedef int MQTTPersistence_afterRead(void* context, char** buffer, int* buflen);

#endif