OpcConnection

```
public interface OpcConnection
```
An OpcConnection is a connection to some kind of OPC server.
It is agnostic of the underlying technology (i.e. OPC Classic vs OPC UA) and instead relies on basic abstractions for read, write, browse, and subscribe.

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static class OpcConnection.State

Nested Classes
Modifier and Type	Interface and Description
`static class`	`OpcConnection.State`

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`java.util.List<OPCBrowseElement>`	`browse(ServerNodeId node)`
`default java.util.List<java.lang.String>`	`getAliases()` Returns the "aliases", or alternative names, for a server.
`java.time.LocalDateTime`	`getConnectionTimestamp()` The timestamp when this connection made the transition to `OpcConnection.State.CONNECTED`, or `null` if not currently connected.
`java.lang.Throwable`	`getFault()` If the `OpcConnection.State` is `OpcConnection.State.FAULTED` then return a `Throwable` containing the reason, otherwise, return `null`.
`java.lang.String`	`getName()` The name of this OPC connection.
`OpcConnection.State`	`getState()`
`java.lang.String`	`getType()` The type of this OPC connection.
`boolean`	`isEnabled()` Returns `true` if this `OpcConnection` is enabled.
`java.util.List<QualifiedValue>`	`read(java.util.List<ServerNodeId> nodes)`
`void`	`shutdown()`
`void`	`startup(OpcSubscriptionModel model)`
`java.util.List<QualityCode>`	`write(java.util.List<OPCWriteRequest> writes)`

- Method Detail
  - getName
```
java.lang.String getName()
```
    The name of this OPC connection. Must match the name of the OPCServerProfileRecord that created it.
  - getType
```
java.lang.String getType()
```
    The type of this OPC connection. Must match the type of the OPCServerProfileRecord that created it.
  - isEnabled
```
boolean isEnabled()
```
    Returns true if this OpcConnection is enabled.
    
    Returns:
    
    boolean true if this OpcConnection is enabled.
  - startup
```
void startup(OpcSubscriptionModel model)
```
  - shutdown
```
void shutdown()
```
  - read
```
java.util.List<QualifiedValue> read(java.util.List<ServerNodeId> nodes)
```
  - write
```
java.util.List<QualityCode> write(java.util.List<OPCWriteRequest> writes)
```
  - browse
```
java.util.List<OPCBrowseElement> browse(ServerNodeId node)
                                 throws java.lang.Exception
```
    Throws:
    
    java.lang.Exception
  - getState
```
OpcConnection.State getState()
```
    Returns:
    
    the current OpcConnection.State of the connection.
  - getConnectionTimestamp
```
@Nullable
java.time.LocalDateTime getConnectionTimestamp()
```
    The timestamp when this connection made the transition to OpcConnection.State.CONNECTED, or null if not currently connected.
  - getFault
```
@Nullable
java.lang.Throwable getFault()
```
    If the OpcConnection.State is OpcConnection.State.FAULTED then return a Throwable containing the reason, otherwise, return null.
    
    Returns:
    
    a Throwable containing the reason for a connection fault, or null if not faulted.
  - getAliases
```
default java.util.List<java.lang.String> getAliases()
```
    Returns the "aliases", or alternative names, for a server.
    This exists primarily to help backwards compatibility, where OPC servers were referred to by their "progids" rather than names.

Interface OpcConnection

Nested Class Summary

Method Summary

Method Detail

getName

getType

isEnabled

startup

shutdown

read

write

browse

getState

getConnectionTimestamp

getFault

getAliases