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#include "rxcpp/rx.hpp"
#include "rxcpp/rx-test.hpp"
#include "catch.hpp"
#include <atomic>
#include <array>
SCENARIO("publish_synchronized sample"){
printf("//! [publish_synchronized sample]\n");
auto values = rxcpp::observable<>::interval(std::chrono::milliseconds(50)).
take(5).
publish_synchronized(rxcpp::observe_on_new_thread());
// Subscribe from the beginning
values.subscribe(
[](long v){printf("[1] OnNext: %ld\n", v);},
[](){printf("[1] OnCompleted\n");});
// Another subscription from the beginning
values.subscribe(
[](long v){printf("[2] OnNext: %ld\n", v);},
[](){printf("[2] OnCompleted\n");});
// Start emitting
values.connect();
// Wait before subscribing
rxcpp::observable<>::timer(std::chrono::milliseconds(75)).subscribe([&](long){
values.subscribe(
[](long v){printf("[3] OnNext: %ld\n", v);},
[](){printf("[3] OnCompleted\n");});
});
// Add blocking subscription to see results
values.as_blocking().subscribe();
printf("//! [publish_synchronized sample]\n");
}
SCENARIO("publish subject sample"){
printf("//! [publish subject sample]\n");
auto values = rxcpp::observable<>::interval(std::chrono::milliseconds(50), rxcpp::observe_on_new_thread()).
take(5).
publish();
// Subscribe from the beginning
values.subscribe(
[](long v){printf("[1] OnNext: %ld\n", v);},
[](){printf("[1] OnCompleted\n");});
// Another subscription from the beginning
values.subscribe(
[](long v){printf("[2] OnNext: %ld\n", v);},
[](){printf("[2] OnCompleted\n");});
// Start emitting
values.connect();
// Wait before subscribing
rxcpp::observable<>::timer(std::chrono::milliseconds(75)).subscribe([&](long){
values.subscribe(
[](long v){printf("[3] OnNext: %ld\n", v);},
[](){printf("[3] OnCompleted\n");});
});
// Add blocking subscription to see results
values.as_blocking().subscribe();
printf("//! [publish subject sample]\n");
}
SCENARIO("publish behavior sample"){
printf("//! [publish behavior sample]\n");
auto values = rxcpp::observable<>::interval(std::chrono::milliseconds(50), rxcpp::observe_on_new_thread()).
take(5).
publish(0L);
// Subscribe from the beginning
values.subscribe(
[](long v){printf("[1] OnNext: %ld\n", v);},
[](){printf("[1] OnCompleted\n");});
// Another subscription from the beginning
values.subscribe(
[](long v){printf("[2] OnNext: %ld\n", v);},
[](){printf("[2] OnCompleted\n");});
// Start emitting
values.connect();
// Wait before subscribing
rxcpp::observable<>::timer(std::chrono::milliseconds(75)).subscribe([&](long){
values.subscribe(
[](long v){printf("[3] OnNext: %ld\n", v);},
[](){printf("[3] OnCompleted\n");});
});
// Add blocking subscription to see results
values.as_blocking().subscribe();
printf("//! [publish behavior sample]\n");
}
SCENARIO("publish diamond bgthread sample"){
printf("//! [publish diamond bgthread sample]\n");
/*
* Implements the following diamond graph chain with publish+connect on a background thread.
*
* Values
* / \
* *2 *100
* \ /
* Merge
*/
auto values = rxcpp::observable<>::interval(std::chrono::milliseconds(50), rxcpp::observe_on_new_thread()).
take(5).
publish();
// Left side multiplies by 2.
auto left = values.map(
[](long v){printf("[1] OnNext: %ld -> %ld\n", v, v*2); return v * 2;} );
// Right side multiplies by 100.
auto right = values.map(
[](long v){printf("[2] OnNext: %ld -> %ld\n", v, v*100); return v * 100; });
// Merge the left,right sides together.
// The items are emitted interleaved ... [left1, right1, left2, right2, left3, right3, ...].
auto merged = left.merge(right);
std::atomic<bool> completed{false};
// Add subscription to see results
merged.subscribe(
[](long v) { printf("[3] OnNext: %ld\n", v); },
[&]() { printf("[3] OnCompleted:\n"); completed = true; });
// Start emitting
values.connect();
// Block until subscription terminates.
while (!completed) {}
// Note: consider using ref_count(other) in real code, it's more composable.
printf("//! [publish diamond bgthread sample]\n");
}
SCENARIO("publish diamond samethread sample"){
printf("//! [publish diamond samethread sample]\n");
/*
* Implements the following diamond graph chain with publish+connect diamond without using threads.
*
* Values
* / \
* *2 *100
* \ /
* Merge
*/
std::array<int, 5> a={{1, 2, 3, 4, 5}};
auto values = rxcpp::observable<>::iterate(a).
publish();
// Left side multiplies by 2.
auto left = values.map(
[](long v){printf("[1] OnNext: %ld -> %ld\n", v, v*2); return v * 2;} );
// Right side multiplies by 100.
auto right = values.map(
[](long v){printf("[2] OnNext: %ld -> %ld\n", v, v*100); return v * 100; });
// Merge the left,right sides together.
// The items are emitted interleaved ... [left1, right1, left2, right2, left3, right3, ...].
auto merged = left.merge(right);
// Add subscription to see results
merged.subscribe(
[](long v) { printf("[3] OnNext: %ld\n", v); },
[&]() { printf("[3] OnCompleted:\n"); });
// Start emitting
// - because there are no other threads here, the connect call blocks until the source
// calls on_completed.
values.connect();
// Note: consider using ref_count(other) in real code, it's more composable.
printf("//! [publish diamond samethread sample]\n");
}
// see also examples/doxygen/ref_count.cpp for more diamond examples
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