subscribe-bookmark-rate-replace

Including the basic AMPS library:

#include <amps/ampsplusplus.hpp>

Constructing the subscribe command:

AMPS::Command cmd(AMPS::Message::Command::Subscribe);
cmd.setTopic(topic);

// Set consistent subId for recovery purposes and for use in replace the subscription
cmd.setSubId(subId);

// Start from the recovery point in the bookmark store
cmd.setBookmark(AMPS::Client::MOST_RECENT());

// Set options for replay: in this case, maximum of 10,000
// messages/sec for this subscription
AMPS::Message::Options opts;
opts.setRate("1000");
cmd.setOptions(opts);

The command can now be used in execute or executeAsync.

Constructing the replace command:

AMPS::Command cmd(AMPS::Message::Command::Subscribe);
cmd.setTopic(topic);

// Set ID of subscription to be replaced
cmd.setSubId(subId);

// Set options for updated subscription: in this case, maximum of
// 100 messages/sec, and replace to update the current rate option.
AMPS::Message::Options opts;
opts.setRate("100");
opts.setReplace();
cmd.setOptions(opts);

The command can now be used in execute or executeAsync to update the previous subscriptions rate option.