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Merge pull request #12 from cryptomator/feature/mount-provider
Feature: Mount Provider
2 parents fd0b30d + 3a17610 commit d01284f

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‎pom.xml‎

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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter</artifactId>
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<version>5.8.2</version>
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<version>5.9.0</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<version>4.3.1</version>
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<version>4.8.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>

‎src/main/java/module-info.java‎

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import org.cryptomator.integrations.mount.MountProvider;
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import org.cryptomator.integrations.tray.TrayMenuController;
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import org.cryptomator.integrations.autostart.AutoStartProvider;
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import org.cryptomator.integrations.keychain.KeychainAccessProvider;
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exports org.cryptomator.integrations.autostart;
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exports org.cryptomator.integrations.common;
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exports org.cryptomator.integrations.keychain;
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exports org.cryptomator.integrations.mount;
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exports org.cryptomator.integrations.tray;
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exports org.cryptomator.integrations.uiappearance;
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uses AutoStartProvider;
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uses KeychainAccessProvider;
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uses MountProvider;
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uses TrayIntegrationProvider;
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uses TrayMenuController;
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uses UiAppearanceProvider;

‎src/main/java/org/cryptomator/integrations/mount/Mount.java‎

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package org.cryptomator.integrations.mount;
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import java.nio.file.Path;
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/**
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* Handle to control the lifecycle of a mounted file system.
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* <p>
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* Created by {@link MountBuilder}
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*/
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public interface Mount extends AutoCloseable {
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/**
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* Returns the absolute OS path, where this mount can be accessed.
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*
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* @return Absolute path to the mountpoint.
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*/
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Path getMountpoint();
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/**
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* Unmounts the mounted Volume.
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* <p>
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* If possible, attempt a graceful unmount.
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*
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* @throws UnmountFailedException If the unmount was not successful.
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* @see #unmountForced()
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*/
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void unmout() throws UnmountFailedException;
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/**
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* If supported, force-unmount the volume.
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*
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* @throws UnmountFailedException If the unmount was not successful.
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* @throws UnsupportedOperationException If {@link MountFeature#UNMOUNT_FORCED} is not supported
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*/
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default void unmountForced() throws UnmountFailedException {
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throw new UnsupportedOperationException();
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}
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default void close() throws UnmountFailedException {
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unmout();
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}
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}

‎src/main/java/org/cryptomator/integrations/mount/MountBuilder.java‎

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package org.cryptomator.integrations.mount;
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import org.jetbrains.annotations.Contract;
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import org.jetbrains.annotations.Range;
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import java.nio.file.Path;
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/**
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* Builder to mount a filesystem.
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* <p>
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* The setter may attempt to validate the input, but {@link #mount()} may still fail due to missing or invalid (combination of) options.
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* This holds especially for {@link MountBuilder#setMountFlags(String)};
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*/
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public interface MountBuilder {
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/**
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* Sets the mount point.
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*
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* @param mountPoint Where to mount the volume
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* @return <code>this</code>
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* @see MountProvider#getDefaultMountPoint(String)
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*/
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@Contract("_ -> this")
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MountBuilder setMountpoint(Path mountPoint);
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/**
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* Sets mount flags.
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*
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* @param mountFlags Mount flags
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* @return <code>this</code>
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* @throws UnsupportedOperationException If {@link MountFeature#MOUNT_FLAGS} is not supported
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* @see MountProvider#getDefaultMountFlags(String)
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*/
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@Contract("_ -> this")
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default MountBuilder setMountFlags(String mountFlags) {
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throw new UnsupportedOperationException();
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}
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/**
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* Instructs the mount to be read-only.
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*
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* @param mountReadOnly Whether to mount read-only.
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* @return <code>this</code>
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* @throws UnsupportedOperationException If {@link MountFeature#READ_ONLY} is not supported
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*/
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@Contract("_ -> this")
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default MountBuilder setReadOnly(boolean mountReadOnly) {
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throw new UnsupportedOperationException();
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}
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/**
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* Use the given TCP port.
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*
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* @param port fixed TCP port or 0 to use a system-assigned port
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* @return <code>this</code>
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* @throws UnsupportedOperationException If {@link MountFeature#PORT} is not supported
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*/
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@Contract("_ -> this")
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default MountBuilder setPort(@Range(from = 0, to = Short.MAX_VALUE) int port) {
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throw new UnsupportedOperationException();
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}
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/**
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* Mounts the file system.
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*
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* @return A mount handle
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* @throws MountFailedException If mounting failed
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*/
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@Contract(" -> new")
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Mount mount() throws MountFailedException;
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}

‎src/main/java/org/cryptomator/integrations/mount/MountFailedException.java‎

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package org.cryptomator.integrations.mount;
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public class MountFailedException extends Exception {
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public MountFailedException(String msg) {
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super(msg);
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}
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public MountFailedException(Exception cause) {
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super(cause);
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}
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public MountFailedException(String msg, Exception cause) {
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super(msg, cause);
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}
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}

‎src/main/java/org/cryptomator/integrations/mount/MountFeature.java‎

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package org.cryptomator.integrations.mount;
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/**
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* Describes what aspects of the mount implementation can or should be used.
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* <p>
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* This may be used to show or hide different configuration options depending on the chosen mount provider.
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*/
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public enum MountFeature {
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/**
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* The provider supports {@link MountProvider#getDefaultMountFlags(String)}
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* and the builder requires {@link MountBuilder#setMountFlags(String)}.
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*/
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MOUNT_FLAGS,
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/**
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* With the exception of a provider-supplied default mount point, the mount point must be an existing dir.
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* <p>
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* This option is mutually exclusive with {@link #MOUNT_WITHIN_EXISTING_PARENT}.
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*
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* @see #DEFAULT_MOUNT_POINT
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*/
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MOUNT_TO_EXISTING_DIR,
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/**
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* With the exception of a provider-supplied default mount point, the mount point must be a non-existing
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* child within an existing parent.
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* <p>
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* This option is mutually exclusive with {@link #MOUNT_TO_EXISTING_DIR}.
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*
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* @see #DEFAULT_MOUNT_POINT
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*/
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MOUNT_WITHIN_EXISTING_PARENT,
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/**
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* The mount point may be a drive letter.
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*
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* @see #MOUNT_TO_EXISTING_DIR
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* @see #MOUNT_WITHIN_EXISTING_PARENT
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*/
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MOUNT_AS_DRIVE_LETTER,
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/**
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* The provider supports suggesting a default mount point via {@link MountProvider#getDefaultMountPoint(String)}.
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* <p>
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* The default mount point is guaranteed to be supported by the mount builder, regardless of its normal restrictions.
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*/
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DEFAULT_MOUNT_POINT,
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/**
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* The builder supports {@link MountBuilder#setReadOnly(boolean)}
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*/
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READ_ONLY,
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/**
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* The mount supports {@link Mount#unmountForced()}.
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*/
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UNMOUNT_FORCED,
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/**
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* The provider supports {@link MountProvider#getDefaultPort()}
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* and the builder requires {@link MountBuilder#setPort(int)}.
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*/
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PORT
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}

‎src/main/java/org/cryptomator/integrations/mount/MountProvider.java‎

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package org.cryptomator.integrations.mount;
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import org.cryptomator.integrations.common.IntegrationsLoader;
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import org.jetbrains.annotations.Contract;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Range;
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import java.nio.file.Path;
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import java.util.Set;
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import java.util.stream.Stream;
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/**
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* A mechanism to mount a file system.
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*
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* @since 1.2.0
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*/
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public interface MountProvider {
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/**
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* Loads all supported mount providers.
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*
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* @return Stream of supported MountProviders (may be empty)
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*/
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static Stream<MountProvider> get() {
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return IntegrationsLoader.loadAll(MountProvider.class).filter(MountProvider::isSupported);
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}
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/**
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* Name of this provider.
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*
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* @return A human readable name of this provider
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*/
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String displayName();
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/**
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* Indicates, if this provider can be used.
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*
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* @return true, if this provider is supported in the current OS environment
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* @implSpec This check needs to return fast and in constant time
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*/
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boolean isSupported();
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/**
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* A suitable mount point suggested by this provider.
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* <p>
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* Other than caller-provided mount points, the mount point suggested by this method can be
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* passed to {@link MountBuilder#setMountpoint(Path)} and is guaranteed to fulfill the builder's requirements
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* without further ado.
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*
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* @param mountPointSuffix String used in the generation of a mount point.
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* @return A path to a possible mount point.
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* @throws UnsupportedOperationException If {@link MountFeature#DEFAULT_MOUNT_POINT} is not supported
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*/
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default Path getDefaultMountPoint(String mountPointSuffix) {
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throw new UnsupportedOperationException();
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}
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/**
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* Default mount flags. May be empty.
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*
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* @param mountName Name of the mount in the OS
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* @return Concatenated String of valid mount flags
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* @throws UnsupportedOperationException If {@link MountFeature#MOUNT_FLAGS} is not supported
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*/
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default String getDefaultMountFlags(String mountName) {
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throw new UnsupportedOperationException();
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}
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/**
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* The default TCP port used by this provider.
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*
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* @return fixed TCP port or 0 to use a system-assigned port
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* @throws UnsupportedOperationException If {@link MountFeature#PORT} is not supported
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*/
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@Range(from = 0, to = Short.MAX_VALUE)
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default int getDefaultPort() {
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throw new UnsupportedOperationException();
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}
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/**
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* Mount features supported by this provider.
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*
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* @return Set of supported {@link MountFeature}s
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*/
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Set<MountFeature> supportedFeatures();
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/**
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* Creates a new mount builder.
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*
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* @param fileSystemRoot The root of the VFS to be mounted
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* @return New mount builder
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*/
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@Contract("_ -> new")
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MountBuilder forFileSystem(Path fileSystemRoot);
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}

‎src/main/java/org/cryptomator/integrations/mount/UnmountFailedException.java‎

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package org.cryptomator.integrations.mount;
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public class UnmountFailedException extends Exception {
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public UnmountFailedException(String msg) {
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super(msg);
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}
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public UnmountFailedException(Exception cause) {
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super(cause);
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}
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public UnmountFailedException(String msg, Exception cause) {
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super(msg, cause);
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}
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}

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