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_6_EventHandler.kt
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_6_EventHandler.kt
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package ai.platon.pulsar.examples
import ai.platon.pulsar.common.urls.UrlAware
import ai.platon.pulsar.context.PulsarContexts
import ai.platon.pulsar.crawl.event.impl.DefaultPageEventHandlers
import ai.platon.pulsar.crawl.common.url.ListenableHyperlink
import ai.platon.pulsar.crawl.fetch.driver.WebDriver
import ai.platon.pulsar.dom.FeaturedDocument
import ai.platon.pulsar.persist.WebPage
import java.util.concurrent.atomic.AtomicInteger
/**
* Print the call sequence and the event name of all page event handlers
* */
class PrintFlowEventHandlers: DefaultPageEventHandlers() {
private val sequencer = AtomicInteger()
private val seq get() = sequencer.incrementAndGet()
init {
loadEventHandlers.apply {
onNormalize.addLast { url ->
println("$seq. load - onNormalize")
url
}
onWillLoad.addLast { url ->
println("$seq. load - onWillLoad")
null
}
onWillFetch.addLast { page ->
println("$seq. load - onWillFetch")
}
onFetched.addLast { page ->
println("$seq. load - onFetched")
}
onWillParse.addLast { page ->
println("$seq. load - onWillParse")
}
onWillParseHTMLDocument.addLast { page ->
println("$seq. load - onWillParseHTMLDocument")
}
onHTMLDocumentParsed.addLast { page: WebPage, document: FeaturedDocument ->
println("$seq. load - onHTMLDocumentParsed")
}
onParsed.addLast { page ->
println("$seq. load - onParsed")
}
onLoaded.addLast { page ->
println("$seq. load - onLoaded")
}
}
browseEventHandlers.apply {
onWillLaunchBrowser.addLast { page ->
println("$seq. browse - onWillLaunchBrowser")
}
onBrowserLaunched.addLast { page, driver ->
println("$seq. browse - onBrowserLaunched")
}
onWillNavigate.addLast { page, driver ->
println("$seq. browse - onWillNavigate")
}
onNavigated.addLast { page, driver ->
println("$seq. browse - onNavigated")
}
onWillInteract.addLast { page, driver ->
println("$seq. browse - onWillInteract")
}
onWillCheckDocumentState.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onWillCheckDocumentState")
}
onDocumentActuallyReady.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onDocumentActuallyReady")
}
onWillScroll.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onWillScroll")
}
onDidScroll.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onDidScroll")
}
onDocumentSteady.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onDocumentSteady")
}
onWillComputeFeature.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onWillComputeFeature")
}
onFeatureComputed.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onFeatureComputed")
}
onDidInteract.addLast { page, driver ->
println("$seq. browse - onDidInteract")
}
onWillStopTab.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onWillStopTab")
}
onTabStopped.addLast { page: WebPage, driver: WebDriver ->
println("$seq. browse - onTabStopped")
}
}
crawlEventHandlers.apply {
onWillLoad.addLast { url: UrlAware ->
println("$seq. crawl - onWillLoad")
url
}
onLoaded.addLast { url, page ->
println("$seq. crawl - onLoaded")
}
}
}
}
/**
* Demonstrates how to use event handlers.
* */
fun main() {
val url = "https://www.amazon.com/dp/B0C1H26C46"
val session = PulsarContexts.createSession()
val link = ListenableHyperlink(url, args = "-refresh -parse", event = PrintFlowEventHandlers())
// submit the link to the fetch pool.
session.submit(link)
// wait until all done.
PulsarContexts.await()
}