Progress

src/main/lombok/module-info.java

@@ -1,7 +0,0 @@
-module org.warp.filesponge {
-	exports org.warp.filesponge.api;
-	exports org.warp.filesponge.extra.api;
-	exports org.warp.filesponge.value;
-	requires lombok;
-	requires org.jetbrains.annotations;
-}

src/main/lombok/org/warp/filesponge/BaseMirrorFileSource.java

@@ -23,9 +23,10 @@ import lombok.AllArgsConstructor;
 import org.warp.filesponge.api.FileSource;
 import org.warp.filesponge.value.MirrorURI;
 
-@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor(access = AccessLevel.PROTECTED)
 public abstract class BaseMirrorFileSource implements FileSource {
 
-	private final MirrorURI mirrorURI;
+	protected final ReceiverAvailabilityManager receiverAvailabilityManager;
+	protected final MirrorURI mirrorURI;
 
 }

src/main/lombok/org/warp/filesponge/FileMirrorsManager.java

@@ -0,0 +1,77 @@
+/*
+ *     FileSponge
+ *     Copyright (C) 2020 Andrea Cavalli
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.warp.filesponge;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+import lombok.AllArgsConstructor;
+import org.warp.commonutils.type.MultiAssociation;
+import org.warp.filesponge.value.FileURI;
+import org.warp.filesponge.value.MirrorURI;
+
+@AllArgsConstructor()
+public class FileMirrorsManager {
+
+	private final Set<MirrorURI> availableMirrors = new HashSet<>();
+	/**
+	 * This map must be persistent
+	 */
+	private final MultiAssociation<FileURI, MirrorURI> fileMirrors;
+
+	public synchronized Set<MirrorURI> getAvailableMirrors(FileURI fileURI) {
+		return fileMirrors
+				.getLinks(fileURI)
+				.stream()
+				.filter(this::isMirrorAvailable)
+				.collect(Collectors.toUnmodifiableSet());
+	}
+
+	public synchronized boolean hasAnyAvailableReceiver(FileURI uri) {
+		return fileMirrors.getLinks(uri).stream().anyMatch(this::isMirrorAvailable);
+	}
+
+	public synchronized void addMirror(FileURI uri, MirrorURI mirrorURI) {
+		fileMirrors.link(uri, mirrorURI);
+	}
+
+	public synchronized void removeMirror(FileURI uri, MirrorURI mirrorURI) {
+		fileMirrors.unlink(uri, mirrorURI);
+	}
+
+	public synchronized void unsetAllFiles() {
+		fileMirrors.clear();
+	}
+
+	public synchronized void setAllMirrorsAsUnavailable() {
+		availableMirrors.clear();
+	}
+
+	public synchronized void setReceiverAvailability(MirrorURI mirrorURI, boolean available) {
+		if (available) {
+			availableMirrors.add(mirrorURI);
+		} else {
+			availableMirrors.remove(mirrorURI);
+		}
+	}
+
+	public synchronized boolean isMirrorAvailable(MirrorURI mirrorURI) {
+		return this.availableMirrors.contains(mirrorURI);
+	}
+}

src/main/lombok/org/warp/filesponge/ReceiverAvailabilityManager.java

@@ -0,0 +1,28 @@
+/*
+ *     FileSponge
+ *     Copyright (C) 2020 Andrea Cavalli
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.warp.filesponge;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+
+@AllArgsConstructor(access = AccessLevel.PUBLIC)
+public class ReceiverAvailabilityManager {
+
+	private final FileMirrorsManager fileReceiversManager;
+}

src/main/lombok/org/warp/filesponge/SecureFileAccessor.java

@@ -22,7 +22,6 @@ import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import lombok.AllArgsConstructor;
 import lombok.EqualsAndHashCode;
-import lombok.ToString;
 import org.jetbrains.annotations.NotNull;
 import org.warp.filesponge.api.FileAccessor;
 import org.warp.filesponge.value.FileContent;
@@ -34,7 +33,6 @@ import org.warp.filesponge.value.FileURI;
  */
 @AllArgsConstructor
 @EqualsAndHashCode
-@ToString
 public class SecureFileAccessor implements FileAccessor {
 
 	private final FileAccessor fileAccessor;
@@ -53,4 +51,9 @@ public class SecureFileAccessor implements FileAccessor {
 	public @NotNull FileStatus getStatus(@NotNull FileURI fileURI) {
 		return fileAccessor.getStatus(fileURI);
 	}
+
+	@Override
+	public String toString() {
+		return fileAccessor.toString();
+	}
 }