Add some logging to element loader

[Sone.git] / src / main / kotlin / net / pterodactylus / sone / core / DefaultElementLoader.kt

diff --git a/src/main/kotlin/net/pterodactylus/sone/core/DefaultElementLoader.kt b/src/main/kotlin/net/pterodactylus/sone/core/DefaultElementLoader.kt
index 98a2caa..3f33efe 100644 (file)
--- a/src/main/kotlin/net/pterodactylus/sone/core/DefaultElementLoader.kt
+++ b/src/main/kotlin/net/pterodactylus/sone/core/DefaultElementLoader.kt
@@ -11,34 +11,41 @@ import javax.inject.Inject
 /**
  * [ElementLoader] implementation that uses a simple Guava [com.google.common.cache.Cache].
  */
-class DefaultElementLoader @Inject constructor(private val freenetInterface: FreenetInterface, ticker: Ticker = Ticker.systemTicker()) : ElementLoader {
+class DefaultElementLoader(private val freenetInterface: FreenetInterface, ticker: Ticker) : ElementLoader {
+
+       @Inject constructor(freenetInterface: FreenetInterface) : this(freenetInterface, Ticker.systemTicker())
 
        private val loadingLinks = CacheBuilder.newBuilder().build<String, Boolean>()
        private val failureCache = CacheBuilder.newBuilder().ticker(ticker).expireAfterWrite(30, MINUTES).build<String, Boolean>()
        private val imageCache = CacheBuilder.newBuilder().build<String, LinkedElement>()
        private val callback = object : FreenetInterface.BackgroundFetchCallback {
                override fun cancelForMimeType(uri: FreenetURI, mimeType: String): Boolean {
+                       println("Got MIME Type “$mimeType” for $uri.")
                        return !mimeType.startsWith("image/")
                }
 
                override fun loaded(uri: FreenetURI, mimeType: String, data: ByteArray) {
+                       println("Got ${data.size} Bytes with MIME Type $mimeType for $uri.")
                        if (!mimeType.startsWith("image/")) {
                                return
                        }
                        ByteArrayInputStream(data).use {
                                ImageIO.read(it)
                        }?.let {
+                               println("Successfully parsed images from $uri.")
                                imageCache.get(uri.toString()) { LinkedElement(uri.toString()) }
                        }
                        removeLoadingLink(uri)
                }
 
                override fun failed(uri: FreenetURI) {
+                       println("Failed to load $uri.")
                        failureCache.put(uri.toString(), true)
                        removeLoadingLink(uri)
                }
 
                private fun removeLoadingLink(uri: FreenetURI) {
+                       println("Not loading anymore: $uri.")
                        synchronized(loadingLinks) {
                                loadingLinks.invalidate(uri.toString())
                        }
@@ -46,18 +53,23 @@ class DefaultElementLoader @Inject constructor(private val freenetInterface: Fre
        }
 
        override fun loadElement(link: String): LinkedElement {
+               println("Checking for $link...")
                synchronized(loadingLinks) {
                        imageCache.getIfPresent(link)?.run {
+                               println("In the Image Cache: $link")
                                return this
                        }
                        failureCache.getIfPresent(link)?.run {
+                               println("In the Failure Cache: $link")
                                return LinkedElement(link, failed = true)
                        }
                        if (loadingLinks.getIfPresent(link) == null) {
+                               println("Not loading: $link")
                                loadingLinks.put(link, true)
                                freenetInterface.startFetch(FreenetURI(link), callback)
                        }
                }
+               println("Returning loading element: $link")
                return LinkedElement(link, loading = true)
        }