/**
* Returns the ReplicaStoreState of a given file in a specific replica.
*
* @param filename The name of the file for the ReplicaStoreState.
* @param replicaChannelName The name of the identification channel for uniquely identifying the
* replica of for the ReplicaStoreState.
* @return The ReplicaStoreState of a given file in a specific replica.
* @throws ArgumentNotValid If the filename or the replica id is null or the empty string.
*/
@Override
public ReplicaStoreState getState(String filename, String replicaChannelName)
throws ArgumentNotValid {
ArgumentNotValid.checkNotNullOrEmpty(filename, "String filename");
ArgumentNotValid.checkNotNullOrEmpty(replicaChannelName, "String replicaChannelName");
Replica rep = Channels.retrieveReplicaFromIdentifierChannel(replicaChannelName);
// retrieve the ReplicaStoreState from the database.
return database.getReplicaStoreState(filename, rep.getId());
}
/**
* Sets the store state of an entry to a specific value.
*
* @param filename The name of the file for the entry.
* @param repChannelId The identification channel of the replica for the entry.
* @param state The new state for the entry.
* @throws ArgumentNotValid If the ReplicaStoreState is null, or if either the filename or the
* replica identification channel is either null or the empty string.
*/
@Override
public void setState(String filename, String repChannelId, ReplicaStoreState state)
throws ArgumentNotValid {
ArgumentNotValid.checkNotNull(state, "ReplicaStoreState state");
ArgumentNotValid.checkNotNullOrEmpty(filename, "String filename");
ArgumentNotValid.checkNotNullOrEmpty(repChannelId, "String repChannelId");
// retrieve the replica
Replica rep = Channels.retrieveReplicaFromIdentifierChannel(repChannelId);
// update the database.
database.setReplicaStoreState(filename, rep.getId(), state);
}
/**
* Determines whether a given file in a specific replica has a valid replica store state. By valid
* means a replica store state other that UNKNOWN_UPLOAD_STATE.
*
* <p>TODO Find out if the assumption that all upload states besides UNKNOWN_UPLOAD_STATE are
* acceptable!
*
* @param filename The name of the file for the ReplicaStoreState.
* @param repChannelId The identification channel of the replica for the ReplicaStoreState.
* @return Whether a given file in a specific replica has a valid store state.
* @throws ArgumentNotValid If either the filenames or the replica identification channel is null
* or the empty string.
*/
@Override
public boolean hasState(String filename, String repChannelId) throws ArgumentNotValid {
ArgumentNotValid.checkNotNullOrEmpty(filename, "String filename");
ArgumentNotValid.checkNotNullOrEmpty(repChannelId, "String repChannelId");
// retrieve the replica
Replica rep = Channels.retrieveReplicaFromIdentifierChannel(repChannelId);
// retrieve the state for the entry for the replica and filename
ReplicaStoreState state = database.getReplicaStoreState(filename, rep.getId());
// return whether the entry has a known upload state
return state != ReplicaStoreState.UNKNOWN_UPLOAD_STATE;
}
