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Rework hooks structure to be a linkedlist

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Allows for safe removal of hooks whilst they are being invoked
This commit is contained in:
Nick O'Leary
2021-04-26 21:14:42 +01:00
parent 250005ad16
commit f7210effec
2 changed files with 100 additions and 26 deletions
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39
test/unit/@node-red/util/lib/hooks_spec.js
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@@ -121,7 +121,46 @@ describe("util/hooks", function() {
})
})
})
it("allows a hook to remove itself whilst being called", function(done) {
let data = { order: [] }
hooks.add("onSend.A", function(payload) { payload.order.push("A") } )
hooks.add("onSend.B", function(payload) {
hooks.remove("*.B");
})
hooks.add("onSend.C", function(payload) { payload.order.push("C") } )
hooks.add("onSend.D", function(payload) { payload.order.push("D") } )
hooks.trigger("onSend", data, err => {
try {
should.not.exist(err);
data.order.should.eql(["A","C","D"])
done();
} catch(e) {
done(e);
}
})
});
it("allows a hook to remove itself and others whilst being called", function(done) {
let data = { order: [] }
hooks.add("onSend.A", function(payload) { payload.order.push("A") } )
hooks.add("onSend.B", function(payload) {
hooks.remove("*.B");
hooks.remove("*.C");
})
hooks.add("onSend.C", function(payload) { payload.order.push("C") } )
hooks.add("onSend.D", function(payload) { payload.order.push("D") } )
hooks.trigger("onSend", data, err => {
try {
should.not.exist(err);
data.order.should.eql(["A","D"])
done();
} catch(e) {
done(e);
}
})
});
it("halts execution on return false", function(done) {
hooks.add("onSend.A", function(payload) { payload.order.push("A"); return false } )