I have a java web application. When ever a user signup i create a wallet
for them. I use the below code to create wallet for user and put that
wallet object in Map<String,Wallet>.
/**
* This is the global map that maintain wallet across application. When ever
* i have to get balance or make transaction i use wallet object in the map.
*
* The main reason for doing this is that Wallet object in map will always
* be in synchronization with the blockchain
*/
Map<String, Wallet> applicationWalletMap = new HashMap<String, Wallet>();
public void createWalletForUser() throws IOException{
int bits = 128;
SecureRandom random = new SecureRandom();
DeterministicKeyChain determinstickeychain = new DeterministicKeyChain(
random, bits);
DeterministicSeed seed = determinstickeychain.getSeed();
System.out.println("seed " + seed.getSeedBytes());
Wallet wallet = Wallet.fromSeed(TestNet3Params.get(), seed);
ECKey eckey = new ECKey();
wallet.importKey(eckey);
String fileName = UUID.randomUUID().toString();
wallet.saveToFile(new File("/opt/"+fileName+".dat"));
System.out.println("Wallet has been created");
applicationWalletMap.put(fileName, wallet);
}
Also I put all user's synchronized wallet object in *applicationWalletMap *when
i start web application.
The issue is that when user keep on increasing the size of
*applicationWalletMap
*increases. *This consumes a lot of RAM*. So is there is any efficient way
to handle this problem.
Thanks in advance
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