DnsDiscovery (bitcoinj-core 0.17-alpha5 API)

java.lang.Object
- org.bitcoinj.net.discovery.MultiplexingDiscovery
- - org.bitcoinj.net.discovery.DnsDiscovery

All Implemented Interfaces:

PeerDiscovery
```
public class DnsDiscovery
extends MultiplexingDiscovery
```
Supports peer discovery through DNS.

Failure to resolve individual host names will not cause an Exception to be thrown. However, if all hosts passed fail to resolve a PeerDiscoveryException will be thrown during getPeers().

DNS seeds do not attempt to enumerate every peer on the network. MultiplexingDiscovery.getPeers(long, Duration) will return up to 30 random peers from the set of those returned within the timeout period. If you want more peers to connect to, you need to discover them via other means (like addr broadcasts).

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class DnsDiscovery.DnsSeedDiscovery
Implements discovery from a single DNS host.

Field Summary
- Fields inherited from class org.bitcoinj.net.discovery.MultiplexingDiscovery
  netParams, seeds

Constructor Summary

Constructors
Constructor	Description
`DnsDiscovery(java.lang.String[] dnsSeeds, Network network)`	Supports finding peers through DNS A records.
`DnsDiscovery(java.lang.String[] dnsSeeds, NetworkParameters params)`	Deprecated. Use `DnsDiscovery(String[], Network)`
`DnsDiscovery(Network network)`	Supports finding peers through DNS A records.
`DnsDiscovery(NetworkParameters netParams)`	Deprecated. Use `DnsDiscovery(Network)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

protected java.util.concurrent.ExecutorService createExecutor()
- Methods inherited from class org.bitcoinj.net.discovery.MultiplexingDiscovery
  forServices, forServices, forServices, forServices, getPeers, shutdown
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
- Methods inherited from interface org.bitcoinj.net.discovery.PeerDiscovery
  getPeers

- Constructor Detail
  - DnsDiscovery
```
public DnsDiscovery(Network network)
```
    Supports finding peers through DNS A records. Community run DNS entry points will be used.
    
    Parameters:
    
    network - Network to be used for port information.
  - DnsDiscovery
```
public DnsDiscovery(java.lang.String[] dnsSeeds,
                    Network network)
```
    Supports finding peers through DNS A records.
    
    Parameters:
    
    dnsSeeds - Host names to be examined for seed addresses.
    
    network - Network to be used for port information.
  - DnsDiscovery
```
@Deprecated
public DnsDiscovery(NetworkParameters netParams)
```
    Deprecated.
    Use DnsDiscovery(Network)
  - DnsDiscovery
```
@Deprecated
public DnsDiscovery(java.lang.String[] dnsSeeds,
                    NetworkParameters params)
```
    Deprecated.
    Use DnsDiscovery(String[], Network)
- Method Detail
  - createExecutor
```
protected java.util.concurrent.ExecutorService createExecutor()
```
    Overrides:
    
    createExecutor in class MultiplexingDiscovery