torque
79a45fd2e3
subrepo: subdir: "deps/nats.c" merged: "66cec7f" upstream: origin: "https://github.com/nats-io/nats.c.git" branch: "v3.6.1" commit: "66cec7f" git-subrepo: version: "0.4.6" commit: "b8b46501e"
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
// Copyright 2015-2019 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRVPOOL_H_
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#define SRVPOOL_H_
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#include "status.h"
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#include "hash.h"
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// Tracks individual backend servers.
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typedef struct __natsSrv
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{
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natsUrl *url;
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bool didConnect;
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bool isImplicit;
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int reconnects;
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char *tlsName;
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int lastAuthErrCode;
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} natsSrv;
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typedef struct __natsSrvPool
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{
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natsSrv **srvrs;
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natsStrHash *urls;
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int size;
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int cap;
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bool randomize;
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char *user;
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char *pwd;
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} natsSrvPool;
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// This is defined in natsp.h, but natsp.h includes this file. Alternatively,
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// we would need to move the defs above in natsp.h.
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struct __natsOptions;
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#define natsSrvPool_GetSize(p) ((p)->size)
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#define natsSrvPool_GetSrv(p,i) ((p)->srvrs[(i)])
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#define natsSrvPool_SetSrvDidConnect(p,i,c) (natsSrvPool_GetSrv((p),(i))->didConnect=(c))
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#define natsSrvPool_SetSrvReconnects(p,i,r) (natsSrvPool_GetSrv((p),(i))->reconnects=(r))
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// Create the server pool using the options given.
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// We will place a Url option first, followed by any
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// Server Options. We will randomize the server pool unlesss
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// the NoRandomize flag is set.
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natsStatus
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natsSrvPool_Create(natsSrvPool **newPool, struct __natsOptions *opts);
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// Return the server corresponding to given `cur` with current position
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// in the pool.
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natsSrv*
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natsSrvPool_GetCurrentServer(natsSrvPool *pool, const natsSrv *cur, int *index);
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// Pop the current server and put onto the end of the list. Select head of list as long
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// as number of reconnect attempts under MaxReconnect.
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natsSrv*
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natsSrvPool_GetNextServer(natsSrvPool *pool, struct __natsOptions *opts, const natsSrv *cur);
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// Go through the list of the given URLs and add them to the pool if not already
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// present.
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natsStatus
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natsSrvPool_addNewURLs(natsSrvPool *pool, const natsUrl *curUrl, char **urls, int urlCount, const char *tlsName, bool *added);
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// Returns an array of servers (as a copy). User is responsible to free the memory.
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natsStatus
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natsSrvPool_GetServers(natsSrvPool *pool, bool implicitOnly, char ***servers, int *count);
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// Destroy the pool, freeing up all memory used.
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void
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natsSrvPool_Destroy(natsSrvPool *pool);
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#endif /* SRVPOOL_H_ */
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