Host.java

package netflix.ocelli;

import java.util.Map;


/**
 * A class for expressing a host.
 *
 * @author Nitesh Kant
 */
public class Host {

    private String hostName;
    private int port;
    private Map<String, String> attributes;
    
    public Host(String hostName, int port) {
        this.hostName = hostName;
        this.port = port;
    }

    public Host(String hostName, int port, Map<String, String> attributes) {
        this.hostName = hostName;
        this.port = port;
        this.attributes = attributes;
    }

    public String getHostName() {
        return hostName;
    }

    public int getPort() {
        return port;
    }
    
    public String getAttributes(String key, String defaultValue) {
        if (attributes != null && attributes.containsKey(key)) {
            return attributes.get(key);
        }
        return defaultValue;
    }
    
    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof Host)) {
            return false;
        }

        Host host = (Host) o;

        return port == host.port && !(hostName != null ? !hostName.equals(host.hostName) : host.hostName != null);
    }

    @Override
    public int hashCode() {
        int result = hostName != null ? hostName.hashCode() : 0;
        result = 31 * result + port;
        return result;
    }
    
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Host [")
          .append("hostName=").append(hostName)
          .append(", port=").append(port);
        
        if (attributes != null && attributes.isEmpty()) {
            sb.append(", attr=").append(attributes);
        }
        return sb.append("]").toString();
    }
}