* Returns some memento of the current state of this target file.
     */
    State getState();

    /**
     * The actual mode of the lock. May be different to what was requested.
     */
    FileLockManager.LockMode getMode();

    /**
     * An immutable snapshot of the state of a lock.
     */
    interface State {
        boolean canDetectChanges();
        boolean isInInitialState();

        this.cache = cacheBuilderFactory.createCacheBuilder(CACHE_KEY)
            .withDisplayName(CACHE_DISPLAY_NAME)
            .withInitialLockMode(FileLockManager.LockMode.OnDemand)
            .open();
        this.gradleVersion = gradleVersion;
    }

    @Override
    public File get(final String identifier, final Action<File> creator) {

        return fileHasher;
    }

    private FileLock exclusiveLockFor(File file) {
        return fileLockManager.lock(
            file,
            mode(FileLockManager.LockMode.Exclusive).useCrossVersionImplementation(),
            "instrumented jar cache"
        );
    }

    private String hashOf(FileSystemLocationSnapshot sourceSnapshot) {

import org.junit.Rule
import spock.lang.Specification

import java.util.function.Consumer

import static org.gradle.cache.FileLockManager.LockMode.Exclusive
import static org.gradle.cache.FileLockManager.LockMode.Shared
import static org.gradle.cache.internal.filelock.DefaultLockOptions.mode

class DefaultCacheFactoryTest extends Specification {
    @Rule

        cache = cacheBuilderFactory
            .createCacheBuilder("javaCompile")
            .withDisplayName("Java compile cache")
            .withInitialLockMode(FileLockManager.LockMode.OnDemand)
            .open();
        IndexedCacheParameters<HashCode, ClassSetAnalysisData> jarCacheParameters = IndexedCacheParameters.of(
            "jarAnalysis",
            new HashCodeSerializer(),

import org.gradle.internal.UncheckedException;

import java.io.File;
import java.util.function.Consumer;
import java.util.function.Supplier;

import static org.gradle.cache.FileLockManager.LockMode.Exclusive;

/**
 * A {@link CrossProcessCacheAccess} implementation used when a cache is opened with an exclusive lock that is held until the cache is closed. This implementation is simply a no-op for these methods.
 */

        cache = cacheBuilderFactory
            .createCacheBuilder("vcsMetadata")
            .withDisplayName("VCS metadata")
            .withInitialLockMode(FileLockManager.LockMode.OnDemand) // Don't need to lock anything until we use the caches
            .open();
        workingDirCache = cache.createIndexedCache("workingDirs", String.class, VALUE_SERIALIZER);
    }

    @Override

        this.cache = cacheBuilderFactory
            .createCacheBuilder("fileContent")
            .withDisplayName("file content cache")
            .withInitialLockMode(FileLockManager.LockMode.OnDemand)
            .open();
    }

    @Override
    public void close() throws IOException {
        cache.close();
    }

    @Override

 * while it is in use. You can change this use {@link CacheBuilder#withInitialLockMode(org.gradle.cache.FileLockManager.LockMode)}.
 *
 * <p>You can use {@link CacheBuilder#withInitializer(java.util.function.Consumer)} to provide an action to initialize the contents

            // and move them atomically into the cache
            // TODO Should use a read-write lock on the cache's base directory for cleanup, though
            .withInitialLockMode(FileLockManager.LockMode.None)
            .open();
        this.cache = cache;
        this.baseDirectory = cache.getBaseDir();