@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// Log.v(TAG,"delete method called");
String key = selection;
if (CommonConstants.QUERY_LOCAL.equals(key)) {
deleteLocalFiles();
} else if (CommonConstants.QUERY_GLOBAL.equals(key)) {
deleteLocalFiles();
StringBuilder sb = new StringBuilder();
sb.append(CommonConstants.MSG_TYPE_DELETE)
.append(CommonConstants.HASH_SEP)
.append(localPort)
.append(CommonConstants.HASH_SEP)
.append(CommonConstants.QUERY_GLOBAL);
String message = sb.toString();
for (Node node : dynamoNodes) {
//// Log.v(TAG,"delete:: Forwarding delete global "+message +" to "+ node.getPortNum());
if (!node.getPortNum().equals(localPort)) {
try {
sendMessage(message, node.getPortNum());
} catch (Exception e) {
// Log.v(TAG, "Error occured while deleting from port "+node.getPortNum());
}
}
}
} else {
int index = findSuccesssorIndex(key);
int snd_cnt = 0;
int num_nodes = dynamoNodes.size();
while (snd_cnt != NUM_REPLICAS) {
Node node = dynamoNodes.get(index);
//// Log.v(TAG, "Deleting specific key "+ key +" from "+node.getPortNum());
if (node.getPortNum().equals(localPort)) {
deleteSingleLocalFile(key);
} else {
StringBuilder sb = new StringBuilder();
sb.append(CommonConstants.MSG_TYPE_DELETE)
.append(CommonConstants.HASH_SEP)
.append(localPort)
.append(CommonConstants.HASH_SEP)
.append(key);
String message = sb.toString();
//// Log.v(TAG,"delete:: Forwarding delete specific key "+message+" to
// "+node.getPortNum());
try {
sendMessage(message, node.getPortNum());
} catch (Exception e) {
// Log.v(TAG, "Error occured while deleting from port "+node.getPortNum());
}
}
index = (index + 1) % num_nodes;
snd_cnt++;
}
}
return 0;
}
@Override
public Cursor query(
Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
//// Log.v(TAG,"Query method called for key "+selection);
MatrixCursor cursor = null;
String key = selection;
synchronized (this) {
if (CommonConstants.QUERY_LOCAL.equals(key)) {
cursor = handleLocalAllQuery();
} else if (CommonConstants.QUERY_GLOBAL.equals(key)) {
cursor = handleGlobalAllQuery();
} else {
cursor = handleSingleKeyQuery(key);
}
}
return cursor;
}
